GN exhaust manifolds on 4.3

[beenen]

was wondering if anyone knows if the grand national exhaust manifolds bolt up to a 4.3 TBI?

 

[clean8485]

As far as I know, it won't work. The Chev and Buick V6s are different. Hopefully someone else will chime in. Some of the 4.3 engines in the Astro vans and pickups had tubular exhaust manifolds that would probably flow better than the cast iron ones. Just a thought.