Originally Posted by dobie6982
I am fixing to rebuild the 360 in my 76 F-150 4X4. I am was going with a 410 but a 428 crank and 410 pistons put out of my budget. I have decided to go with a 390 crank and rods with late 60's Mustang pistons. I am not sure what heads to use or if my stock heads will sufficient. I am also stumped on what cam to use. Its a T-18 4-speed with the granny low, 3.50 gears with 33x12.50s. I do drive this truck alot and am looking for low to mid range torque. I already have an Edelbrock RPM intake and headers. I am leaning toward a Q-Jet built by Jet performance. Any suggestions?
Unless you get into 428 Cobra Jet heads or the 427 heads there just isn't a whole lot of difference in the FE heads besides exhaust manifold hole count and pattern. Your stock heads should be fine especially if you do some pocket porting. That and a 30 degree back cut on the valves which improves mid lift flow works extremely well with a milder cam where the lift is around .4 inch. For a truck with a T-18 4 speed you really don't want to cam it beyond what's called an RV cam as these heavy duty 4 speeds are not up to the flexibility needed to manage a big cam like a passenger car 4 speed would be.
The Q-Jet is a decent choice for this engine as is the Performer RPM which leans a little to preferring the upper RPMs but surprisingly doesn't surrender much bottom end compared to the basic Performer which has no top end.