Greetings to all:
I have a 1973 C10 with a 250. The motor has an Offenhauser 5416 intake with a Holley 8007 (390cfm). The 250 currently has the stock exhaust manifold.
I have seen where many people have removed the stock exhaust manifold and put headers on. My mechanic told me that with the headers every six months or so you need to replace the gasket. As I am not a mechanic I can't afford that.
I just saw a post where a Camaro owner had the same set up and opted to use the 292 exhaust manifold as the exit diameter is 2.5" vs 2.0" of the 250 exhaust manifold.
Should I go for the 292 exhaust manifold or just stick with what I currently have?
