MBLiberty

Hi.

I’m the new owner of a dirty, old, big block Olds engine that runs better than it looks, so far. The engine is currently in a 67 Pontiac. I was told that it’s a 425 engine from a 67 Toronado, but I am skeptical. It looks a lot like a mutt, to me.

The Olds FAQ (e.g., http://www.442.com/oldsfaq/ofblk.htm#Blocks) and searching the big block engine forum has been a big help. But there are a few questions I could still use some help with.
(1) Is there any way to determine if the engine is in fact from a 1967 Toronado?
(2) Does it have a forged crank?
(3) Aside from removing the heads, Is there any way to determine whether
(a) the left head has 2.072” valves and
(b) the right head has 80 cc chambers?

Here’s what I have discovered so far:

A. Block: casting no 389244D. Date code: 285
Apparently a 66 - 67 425 “Big-car engine. Toro is different internally.”

B1. Right head: Id: J; Casting number: 411783
Apparently a 73-76 455 'Smog head' of 80 or 82 CCs, with int. = 2.000" and exh. = 1.625".

B2. Left head: Id: C; Casting number: 394548
Apparently a'67-69 400, 425, or 455 head of 80 CCs, with int. = 2.000" (or 2.072”) and exh. = 1.625".
(Maybe original to the engine? But “On 1967 engines, RH head will have the engine ID stamped into the front.” And the pad on this head looks blank.)

C. Intake manifold: 407567 72
'70-'72 455 4V MT except W-30. No EGR. Iron.

D. Carb: Holley 1850 (List 1850-4 ), choke missing.

E. Exhaust manifolds: Both left and right have Id: A; Casting number: 384785 LH
Application: 1967-1969 full size. 425.
(Left manifold maybe original to the engine?)

F. Oil pan: No crease for a transverse drive shaft. But with this mutt, that probably means about as much as the blue engine paint.

Peace,
Mike

Killian_Mörder

What you describe should have a multi-color engine. If the block is genuine Toronado and never painted, it should be blue. The assorted heads and manifold should be gold, unless the manifold sits unusually low. In which case, it should also be blue

Oldsguy

Welcome to CO. Since one head is a C and the other is a J it sounds like the engine has been cobbled together some in the past, not necessarily a bad thing in itself, just indicating that it may have been put together by Dr. Frankenstein, usually the heads are matching and the carburetor would have been a Rochester.

tru-blue 442

Welcome from Marlbe Falls.
Sounds like a frankenmotor for sure.
The bock is a 425 though. If the crank
is original to the block, forged steel.

There are more guys in the know who
will chime in for you. Good luck with the project.

MBLiberty

Thanks for the welcome. I bought a Quadrajet from EBay today, with electric choke. Once I rebuild it, that will probably be my first change to this engine.

Well, second, actually. I removed the old choke stove from the manifold the other day. Is this "Edelbrock Choke Block-Off Plates 8951" (for "for Edelbrock 2151 and 3711 Manifolds, Oldsmobile, V8") a good way to block off the hole? http://www.summitracing.com/search/p...ake/oldsmobile

If I tried to make one myself, it probably wouldn't look good or last long. I don't have a die grinder, I don't have any aluminum plate handy. So $18.97 is probably not a bad deal.

pdqbob

Bob here from Houston Tx welcome to the forum Im new also

oldcutlass

Welcome to the site, by the way we do like pictures.

Fun71

1 - Not really at this point. The main identifying features of the Toro engine are the large valve heads and the low profile intake manifold.

2 - Yes.

3a - no
3b - all BBO heads have around the same 80cc chambers, but many are slightly larger due to manufacturing tolerances

MBLiberty

Thanks, Eric and Kenneth.
And welcome, Bob.
As for pics, I added a pic of my engine as my profile pic, but it doesn't seem to show in this thread. Maybe it's too big...

Oldsguy

I see the hole for the choke element. That block off plate would probably be a good investment. It looks like the distributor is HEI, indicating not original for '67 either.

MBLiberty

The "70s Quadrajet" turned out to be from a 1987 Dodge truck. The idle mixture screws are blocked, and even if I unblock them, I understand that a special took is needed to turn them. Not to mention a rebuild needed, and the linkage would probably need work/adaptation... Maybe I should just rebuild the Holley 1850 that's on there already...

Killian_Mörder

What a can of worms you got there. Not only is the engine multi-color'd. It's also multi-ethnic