ProComp/Speedmaster aluminum heads

Nobody likes it when I refer to NHRA stock eliminator stuff....... but those things are excellent learning tools/examples on what’s important for getting good ET’s from mild stuff.

One of the best lessons is, the farther you stray from the race combo towards the street combo, the harder it is, or..... the more power you need to make...... to cover up the loss of overall efficiency of the car.

My friend races a 68 Firebird in Stock.
He’s always run a 400 in it.
A couple years ago he decided he wanted to build a 350 for it.
So, it’s a .060 over Pontiac 350, stock compression, the heads they use in 68(the only thing that’s legal) have 1.96 valves, and with a decent valve job they flow [email protected] lift..... which is the max lift allowed.
Stock iron manifold and Q-jet.
3320 race weight.

10.91@121 @2750ft DA