New 360 what time ?????

A360 said
Howdy fellas
Specs

Valiant Hardtop (Dart)
360
727 -3000stall
9'' 3.9 gears
extractors into 2 x 2.5'' system

What are extractors? Is that headers or stock manifolds?

I'm betting on the camshaft since that was what was last changed. Either that or valve lash, weak springs or the like.

Steve