Pontiac intake?

[Robert Swartz]

Originally Posted by mtwilly

1976 firebird 400 stocker build. NHRA bluprint guide says intake manifold casting number needs to be 496140. Every other source i find says that is 1975 only and 1976 and 1977 are 525355. Also, i found a stock 1976 firebird in a salvage yard today and it had the correct 6x-8 heads and the 525355 intake. What do i do? Thanks for the help

Irregardless, if the stuff can be purchased cheap enough. I'd buy it. Call your division director and get his take on this. A 1976 model would have been available in the fall of 1975. There is some possibility of model crossover. I have a similar situation with the guide regarding my 1979 Firebird. I'm looking at possibly hunting down the pieces to build a 1979 350/165(287 factored)hp Chevy engine for NHRA. On the Pontiac side they list an intake manifold #14007376. For a 1979 Malibu, same engine, they list the above manifold and an alternate #346249. Like I said, same engine, why can't I use the alternate manifold, if I could find one?