I was told through a local Ford dealership that I'd need to change my camshaft for a 4bbl camshaft because the timing of the intake & exhaust valves won't be the same(out of syc??) if using an Edelbrock Performer 4bbl. carb (#1406) and Edelbrock 4bbl intake manifold (#2181)?? Is there ANY truth to this?? I do'nt want to have to change my camshaft!!! I own a 1983 F-150 Ford truck with a 351W engine. I have a 2bbl Ford stock carburetor (E2UE-AKA) and 2bbl. Ford stock intake manifold? My engine is'nt the original stock engine? I have instead a 351W from a 1975 F-100 Ford truck? The engine was TOTALLY rebuilt and the camshaft is a:#TRW TM643 351W performance camshaft?? I hope what they said isn't true!!! Thanks!!

 

You can run the cam you have. Just check the cam card and get the firing order right off it. The only thing I can think of is they were thinking multipoint EFI. Even then it should be good.

 

You should still swap the cam anyway. I was somewhat intimidated, but it turned out to be a piece of cake.