Big Block exhaust manifold interchange - Chevelle Tech

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post #1 of 4 (permalink) Old Jun 13th, 10, 11:46 AM Thread Starter
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Big Block exhaust manifold interchange

I found a set of 1973 stock 454 exhaust manifolds. Visually they look the same as a stock set from a 68-72 Chevelle, but are the angles at the end of the manifold's where the exhaust exits going to be the same as the 68-72 Chevelle manifolds?? I heard that all car big block manifolds are pretty much the same??

I dont care about date codes, I just need a stock set to fit on my 1968 Chevelle with a 396 that will be a direct bolt-up to my down pipes.

Dan
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post #2 of 4 (permalink) Old Jun 13th, 10, 11:54 AM
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Re: Big Block exhaust manifold interchange

I had to take a "pie" shaped piece out of the driver's side header pipe to correct the angles when I was temporarily using an exhaust manifold from a 67 Caprice on my 69.
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post #3 of 4 (permalink) Old Jun 13th, 10, 1:07 PM Thread Starter
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Re: Big Block exhaust manifold interchange

Here are the actual manifold numbers:

Passenger side: 353028
Driver side: 329225
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post #4 of 4 (permalink) Old Jun 13th, 10, 1:26 PM
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Re: Big Block exhaust manifold interchange

Those are for 73-76 454 Chevelle and Passenger with and without A.I.R.

Yeah ,the head flange will be the same regardless of application ,just the head pipe flange will be different depending on application.

Here's the Dorman p/n for the 66-72 RH manifold - 674-244
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