ka heads - ClassicOldsmobile.com

ka heads

Old December 21st, 2018, 10:07 AM
  #1  
Registered User
Thread Starter
 
Join Date: Apr 2013
Location: michigan
Posts: 19
ka heads

i have a choice of using big valve ka or big valve c heads any difference between them. going on a 030 455 mild build. all info appreciated
oldaman is offline  
Old December 21st, 2018, 11:13 AM
  #2  
Registered User
 
Join Date: Mar 2007
Posts: 963
As far as flow, they are about the same. If the K are 71 or newer, they will probably have harden seats,compared to the C.
442Harv is offline  
Old December 21st, 2018, 11:21 AM
  #3  
Old(s) Fart
 
joe_padavano's Avatar
 
Join Date: Mar 2007
Location: Northern VA
Posts: 31,460
K and KA heads are 1973-up, primarily for marine applications. Keep in mind that the seats are only induction hardened to a minor depth. Cutting the seats will pretty much remove the hardened layer.
joe_padavano is offline  
Old December 21st, 2018, 03:42 PM
  #4  
MOTORHEAD
 
11971four4two's Avatar
 
Join Date: Feb 2011
Location: minnesota USA
Posts: 3,971
rate the heads
pull off all the rocker arms
Lay your straight edge across the top of the valve stem
Any above or below is not ideal
Cheap leak down test
Put head in parts washer tank fill port with fluid
Tap the vave stem with a hammer "lightly"
Observe any leaky around valve face / head interface

I guess pick which pair will need less machining would be my choice these days

All The Best
11971four4two is offline  
Old December 23rd, 2018, 10:38 AM
  #5  
Registered User
 
Join Date: Mar 2011
Posts: 424
The KAs might have a deeper spring pocket than the Cs. If so thatís a factor for valve spring choice.
VinMichael is offline  
Old December 24th, 2018, 03:07 AM
  #6  
Registered User
Thread Starter
 
Join Date: Apr 2013
Location: michigan
Posts: 19
ka heads

thanks to all who replied good info and ideas
oldaman is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
olds4life
Big Blocks
3
December 25th, 2012 12:56 AM
Oldsmaniac
Parts For Sale
2
November 1st, 2010 06:37 PM
64 CUTLASS KEN
Big Blocks
37
October 19th, 2010 01:26 PM
gearheads78
Parts For Sale
10
November 10th, 2009 09:31 PM
DarkStar
Small Blocks
18
October 21st, 2009 07:35 AM


Thread Tools
Search this Thread
Quick Reply: ka heads


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.