Originally Posted by 375inStroke
Stock, whatever heads came in '71. Must have been rebuilt once, new guides, but smaller than stock cam, and extremely loose chain, retarding the cam 12deg. Put a 220/226 .475"/.494" Lunati, springs, and Cloyes chain.


why a loose chain ?

Pony up for a set of adjustable pushrods ... I doubt your valve stem heights are equal ... and set it at exactly what you want. Use the current length and add ..200 as your max length.

running up my post count some more .