I haven't dynoed it and no headers. Quite frankly, unless they are Tri Y, headers lose too much low end
Found some papery the other day and did some math. The heads are 461x with 1.94 Stainless valves and seats with screw in studs. They've been milled so slightly under 63 cc results in about 10.1:1
Intake is a Zz4 aluminum high rise. These are supposed to be worth 10 HP & 15 lb/ft over a Performer RPM
Exhaust manifolds are ported
Cam is 440/425 220/212 @ .050 on 112/106
When I had the comp program and used these numbers, it said ~300 HP and 425 TQ through manifolds
I can tell you it runs real close to what the K5 did, and that engine was fresh
But does it do good burnouts?
