383 build

[Meep-Meep]

A typical rule of thumb is to size the header primary tube 1/8" larger than the exhaust valve because of the boundary layer of gases flowing in a pipe. For the 1.74" valve 1.875" is about right. 1.75" won't mean the death of your engine, but for higher RPM performance you would benefit from the larger ID.

 

[Budnicks]

I forgot about the Dual-Point

You pegged it! I mean really... Concord in the 80's. Dont' forget the Mallory dual point.

Meeps; very cool old Concord/Plymouth cruiser, That's funny, I forgot all about the OBLIGATORY MALLORY DUAL POINT, everyone had...