Quote:

GTX weighs 3740,race weight,and runs 11.19-11.30 @ 120mph. Motor's a '70' +.040 440 block,10:25:1 Diamond Forged pistons,OTB Eddy Performers,Comp SQ solid flat tappet with .610 lift and 260/266 @ .050 duration,105 installed centerline. M-1 intake,and 850 Holley DP. Headers are 2" TTI's, 3.5 collectors. Any estimates??? -RandyB



Randy,

In the Fall 2007 Engine Masters Magazine, Steve Dulcich dyno'ed a simple 448" motor back to back with stock RPM heads vs Modern Cylinder Head CNC RPM heads.

At 6000-rpm peak, he gained 46 HP with the swap. From 529hp to 574hp
His combo:
- Speed-Pro-2355 pistons, 10.2 compression
- Comp MM Flat tappet cam, 243°/247° @.050, .586/.597 lift, 110°LSA, 106° installed
- Comp 1.6 Roller rockers
- Victor intake
- RS1000 Demon carb
- TTI 2-2_1/8 headers.