Quote Originally Posted by 1gary View Post
The early TPI's have the same 12 bolt patterns as the Dart heads have.
Them 1986 TPI Intakes You are Talking about are Very Rare . 1987 on are a different Bolt Pattern . Just a Heads up so you know what your up against .

As for Valve Springs yes they can be changed as needed . But no need to run over Kill on Valve Spring tension even on a Mild Roller Camshaft Build . Look at the Springs used on the Chevy Roller Engines . They are not that Heavy