Joined: Sep 2009
Location: Amelia / Cincinnati
gt40 heads are ok, you would bolt on about 25 extra hp with those. run a cam w/ 500 lift and 220 something duration with your hi rise. some longtubes and you will feel like your in a totally different car.
also make sure you match the springs in your heads, any brand you get, to work with your cam, ot it will perform like junk.
1968, 302 .030 / Comp Cams Magnum 270h #31-414-3 501 lift @ .050 dur 224/224
Comp Cams Magnum Lifters and Pushrods Comp Cams 1.6 Full Roller Rockers
Edelbrock RPM heads (2.02 / 1.60) / RPM Air Gap
Holley Street Avenger 670 carb
Edelbrock 110gph Fuel Pump
Cloyes Street True Roller Timing Chain / Professional Products Harmonic Balancer
MSD Pro billet Dizzy, 6AL Box, Blaster 2 Coil
Flowtech Long Tube Headers