I would also like to add that Supercomps are usually slip fit collectors, while Comps have a 3 bolt flange.
Again, SCs are technically not a steet part, so you wouldn't use flanges.
Dave
Hey guys thanks alot for your help. I just bought a set of Hedman Elites that fit my FMX Tranny. I gotta wait like 4 weeks cause of backorder but its all worth it for the right part.
I'll bet it was the same part, the same ones I have (see above). My car has an AOD in it and that is quite a bit larger than the C4. IIRC the FMX and AOD are related and about the same size.
Hey guys thanks alot for your help. I just bought a set of Hedman Elites that fit my FMX Tranny. I gotta wait like 4 weeks cause of backorder but its all worth it for the right part.
I bought mine from Summit, some time ago. I told them I needed 351W "swap" headers for a 1967. When I looked up the part number it was the same as another application (don't recall 100% which one), something like "1969 351W with FMX", dunno for sure.
Don't call heddman, call Summit, they are great at tech and customer support.