Re: small block factory dual exhaust manifolds

Thu, 02 Nov 2006 11:19:59 -0800

Hello Mike,  Wow, nice list. I will save it. I did have some nice exhaust manifolds on a 64- 330 but I sold the engine. That was before I had these plans. Thats why I am such a pack-rat, everytime I get rid of something later on down the line I need it.  On the 65-70 B-bodies 'big blocks" I take a Toro drivers-side exhaust manifold, saw it in half towards rear, rotate it about 180 degrees, ni-rod weld it, It requires grinding just a bit by the corner of the steering box but makes a better flowing manifold than the factory S dual manifolds. They just started re-popping the factory dual exhaust manifold a couple years ago. Thanks again, Ken
Mike Stilwell <[EMAIL PROTECTED]> wrote:
Here is a list I put together awhile back.  Any of the below combinations will give you true duals without using a block off plate, and have Olds manifolds.
 
Mike Stilwell  OCA #13273
Secretary - Capitol City Rockets
 
 
 
WANT TO PUT DUALS ON AN OLDS SMALL BLOCK?

What I am listing are the combinations that can be used on a small block for true duals.
Meaning, not having to use a block off plate. These manifolds do not have the dividers like the more desirable W/Z's, but neither do the crossover X-mans. Besides, you can't use a Z
manifold on a small block.

LISTINGS READ AS FOLLOWS:

Year Used - ID/Code - Casting Number - Application
--------------------------------------------

64-70 - 1 - 380001 - LH; X-over. 330 & 350
65-67 - W - 389268 - RH; Cutlass, 442.
--------------------------------------------

65-68 - X - 389269 - LH; Cutlass, 442.
65-67 - W - 389268 - RH; Cutlass, 442.
--------------------------------------------

Year? - 1 - 411961 - LH; No X-over. Straight
down. 307, 350 gas, 350 diesel.
65-67 - W - 389268 - RH; Cutlass, 442.
--------------------------------------------

Year? - 1 - 411961 - LH; No X-over. Straight
down. 307, 350 gas, 350 diesel.
68 - Y - 398706 - RH; Cutlass, 442, some
VC and SX. Ribbed for heat shield.
--------------------------------------------

64-70 - 1 - 380001 - LH; X-over. 330 & 350
68 - Y - 398706 - RH; Cutlass, 442, some
VC and SX. Ribbed for heat shield.

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