1963 Super 88 394 Dual Exhaust Help

Old March 26th, 2019, 07:52 AM
  #1  
Registered User
Thread Starter
 
Join Date: Mar 2019
Posts: 6
1963 Super 88 394 Dual Exhaust Help

Trying to convert the single crossover exhaust to duals on my 394 Rocket. Told I need to find a set of "Rear Drop" exhaust manifolds that typically come off of truck engines. Can anyone point me in the right direction on sourcing these truck exhaust manifolds that work for converting olds rocket single crossover exhaust to a true dual set up? [email protected]
Thanks
willywonkadude is offline  
Old March 26th, 2019, 02:36 PM
  #2  
Registered User
 
D. Yaros's Avatar
 
Join Date: Nov 2006
Location: SE Wisconsin
Posts: 1,802
First I have ever heard of any truck exhaust manifold being able to be utilized for the purpose of converting from single to dual exhaust?

Generally what is needed is a driver side dual exhaust manifold and a crossover pipe cap for the passenger side exhaust manifold. The proper manifold is out there, but hard to find.
D. Yaros is offline  
Old March 26th, 2019, 03:16 PM
  #3  
Old(s) Fart
 
joe_padavano's Avatar
 
Join Date: Mar 2007
Location: Northern VA
Posts: 32,009
Originally Posted by willywonkadude View Post
Trying to convert the single crossover exhaust to duals on my 394 Rocket. Told I need to find a set of "Rear Drop" exhaust manifolds that typically come off of truck engines. Can anyone point me in the right direction on sourcing these truck exhaust manifolds that work for converting olds rocket single crossover exhaust to a true dual set up? [email protected]
Thanks
And exactly what truck ever used an Olds 394 motor? (yes, I am aware that GMCs used the 371 - those manifolds will not work on this application) I would suggest that you need to stop listening to whoever told you that, because clearly they have zero knowledge of Oldsmobile motors.

The RH manifold is the same for both single and dual exhaust - P/N 587510. The LH manifold is unique to the 63-64 394 cars with dual exhaust - P/N 587793.
joe_padavano is offline  
Old March 26th, 2019, 03:22 PM
  #4  
Registered User
 
Join Date: May 2008
Location: Bradford, Ontario
Posts: 716
As Dave stated there is a correct dual exhaust manifold for your car. The manifold is for the 63/64 Starfire and 63/64 98 custom sport coupe. They show up every once in a while and you have a blocker plate on the passenger side where the cross over connects to the manifold. Google the manifold and you will see what it looks like GM # 587798 ( the picture of the one on the red sheet is mine so I know it's right) look under 64 OLDS STARFIRE 98 DUAL EXHAUST MANIFOLD.
Steve
Oldskeeper is online now  
Old March 26th, 2019, 06:51 PM
  #5  
Registered User
 
Join Date: Feb 2013
Posts: 977
the 50's gmc's used pontiac engines.
cherokeepeople is offline  
Old March 26th, 2019, 08:15 PM
  #6  
Registered User
 
OLDSter Ralph's Avatar
 
Join Date: Sep 2017
Location: St. Paul Minnesota
Posts: 1,175
Originally Posted by cherokeepeople View Post
the 50's gmc's used pontiac engines.
I think the exception was the 57-58 GMC when the Olds 371 was used. Some people claim it was the 370 Pontiac in 57-58.
OLDSter Ralph is offline  
Old March 27th, 2019, 03:59 PM
  #7  
Registered User
 
Tedd Thompson's Avatar
 
Join Date: Oct 2004
Location: Forest Ranch Ca.
Posts: 5,175
But it was a 371 for sure.... Tedd
Tedd Thompson is offline  
Old March 27th, 2019, 10:51 PM
  #8  
Phantom Phixer
 
Charlie Jones's Avatar
 
Join Date: Dec 2011
Location: Apopka, FL
Posts: 2,301
GMC used both the Pontiac and Oldsmobile engines in the 1955 thru 1959 period .
In addition to their own line of six cylinder engines .
The Pontiac engines were used in the pickups thru the two ton trucks . Models 100 thru 450 , 287 in 1955 , 316 in 1956 2 , 347 in1957 , and 336 in 1958 & 59.
The latter two years were smaller bore versions of the 370 and 389 .
The larger two and a half ton , series 500 and up , used Oldsmobile engines . 324's in 1955 & 56 and 371's in 1957 thru 59 .
GMC did however refer to the 371 Olds engine as a "370" .

Last edited by Charlie Jones; March 27th, 2019 at 11:06 PM.
Charlie Jones is offline  
Old March 28th, 2019, 05:25 AM
  #9  
Registered User
 
OLDSter Ralph's Avatar
 
Join Date: Sep 2017
Location: St. Paul Minnesota
Posts: 1,175
Charlie, Thank you for clearing that up.
OLDSter Ralph is offline  
Old March 28th, 2019, 07:13 AM
  #10  
Old(s) Fart
 
joe_padavano's Avatar
 
Join Date: Mar 2007
Location: Northern VA
Posts: 32,009
Been a bit of a digression from the OP's question about dual exhaust manifolds...
joe_padavano is offline  
Old April 4th, 2019, 04:28 PM
  #11  
Registered User
Thread Starter
 
Join Date: Mar 2019
Posts: 6
Having a heck of a time finding the correct exhaust manifolds to convert my '63 Olds Super 88 with a 394 to duals.

Do not need the blocker plate for the passenger side manifold.

I just need to find a set of correct exhaust manifolds for this 394 so I can complete my dual exhaust project.

Appreciate any help anyone can offer.
willywonkadude is offline  
Old April 4th, 2019, 06:25 PM
  #12  
Phantom Phixer
 
Charlie Jones's Avatar
 
Join Date: Dec 2011
Location: Apopka, FL
Posts: 2,301
E-Bay is probably your best source .
Set up a perpetual search for " 1963 64 Oldsmobile exhaust manifold " on E-Bay , and they will e-mail you when one turns up .
Expect to see all kinds of gaskets , studs , etc . in that search too .

You will only need the left manifold . The right one you have is used with a block off plate . That's the way the factory did it . There is no special RH manifold for duals .
Expect to pay several hundred dollars . If you find one for cheap , you are truly blessed .

This is what you are looking for ;



Last edited by Charlie Jones; April 4th, 2019 at 06:49 PM.
Charlie Jones is offline  
Old April 5th, 2019, 01:45 PM
  #13  
Registered User
Thread Starter
 
Join Date: Mar 2019
Posts: 6
Name you Price

I'm desperate.

Originally Posted by Charlie Jones View Post
E-Bay is probably your best source .
Set up a perpetual search for " 1963 64 Oldsmobile exhaust manifold " on E-Bay , and they will e-mail you when one turns up .
Expect to see all kinds of gaskets , studs , etc . in that search too .

You will only need the left manifold . The right one you have is used with a block off plate . That's the way the factory did it . There is no special RH manifold for duals .
Expect to pay several hundred dollars . If you find one for cheap , you are truly blessed .

This is what you are looking for ;

willywonkadude is offline  
Old April 6th, 2019, 07:05 AM
  #14  
Phantom Phixer
 
Charlie Jones's Avatar
 
Join Date: Dec 2011
Location: Apopka, FL
Posts: 2,301
Sorry , That manifold is not for sale .
It's going to be installed on my car .
Keep looking , you will eventually find one . They were on all 63 & 64 full size cars equipped with dual exhaust . Not just Starfires and 98 Sport Coupes .
Charlie Jones is offline  
Old June 1st, 2019, 07:19 PM
  #15  
Registered User
 
Join Date: Oct 2018
Location: So. Cal.
Posts: 13
Could you just have a set of custom headers made? Maybe buy a set of header flanges from this company ( http://www.headersbyed.com/index.htm ) and have a whole new exhaust made all the way to the rear of the car.....

I was looking around at this site and wondered if this could be a possibility.

Does anyone have any insight/thoughts?

Beers is offline  
Old June 1st, 2019, 08:17 PM
  #16  
Phantom Phixer
 
Charlie Jones's Avatar
 
Join Date: Dec 2011
Location: Apopka, FL
Posts: 2,301
Originally Posted by Beers View Post
Could you just have a set of custom headers made? Maybe buy a set of header flanges from this company ( http://www.headersbyed.com/index.htm ) and have a whole new exhaust made all the way to the rear of the car.....

I was looking around at this site and wondered if this could be a possibility.

Does anyone have any insight/thoughts?

The frame and steering gear are your biggest obstacles .
If you study the picture of the stock LH manifold above , you will see little clearance around the steering box .
Charlie Jones is offline  
Old July 10th, 2019, 06:35 PM
  #17  
Phantom Phixer
 
Charlie Jones's Avatar
 
Join Date: Dec 2011
Location: Apopka, FL
Posts: 2,301
Here you go williewonkadude ;
https://www.ebay.com/itm/OLDSMOBILE-...YAAOSw1pZdJVxe

Grab you piggy bank and a hammer .
Charlie Jones is offline  
Old July 11th, 2019, 09:24 AM
  #18  
Old(s) Fart
 
joe_padavano's Avatar
 
Join Date: Mar 2007
Location: Northern VA
Posts: 32,009
Originally Posted by Charlie Jones View Post
Here you go williewonkadude ;
https://www.ebay.com/itm/OLDSMOBILE-...YAAOSw1pZdJVxe

Grab you piggy bank and a hammer .
Didn't last long on ebay.
joe_padavano is offline  
Old July 11th, 2019, 05:45 PM
  #19  
Phantom Phixer
 
Charlie Jones's Avatar
 
Join Date: Dec 2011
Location: Apopka, FL
Posts: 2,301
Originally Posted by joe_padavano View Post
Didn't last long on ebay.
Like an ice cream cone in Hell !
Charlie Jones is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
11971four4two
Parts For Sale
15
June 3rd, 2019 11:53 AM
bob p
Big Blocks
3
March 26th, 2015 01:03 PM
Angelov71
The Newbie Forum
5
August 5th, 2013 02:50 PM
rougebeats
Parts For Sale
2
May 24th, 2012 11:45 PM
trackz man
Big Blocks
4
December 13th, 2010 12:45 PM


Thread Tools
Search this Thread
Quick Reply: 1963 Super 88 394 Dual Exhaust Help


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.