Received my stealth heads back from Modern today. Bob was good to work with and everything went as planned and looks good. I realize this is pretty mundane stuff by this boards standards, but I’m pretty jacked up to see what this does for my 451 Satellite combo.

Question is: how much will it pick up?

My combo has been listed here many times over the years, but here it is again for reference:

400 block .040 over
Factory RB crank
Iconn flattops with 4.5cc reliefs at zero deck
Engle custom grind: 252* @ .050 / .573 lift on a 109* cl (square)
1000cfm Holley annular HP
Eddy RPM with a 1/2” open spacer
MSD Digital 6+ box & Mallory mag pickup dizzy
1-7/8” Hooker Comps
9-1/2” Dynamic converter (flashes to about 4K)
Pretty basic manual 727
Full Calvert suspension (springs, bars, & shocks)
4.10’s & 28x9 slicks
Car has weighed 3820

Previous best is in my sig below. In the heat of the summer it was typically in the 11.52 - 11.56 range.

Changes: the heads you see here were previously OTB with as cast 84cc (??) chambers, good for 10.42:1. Heads are now are a verified 82 cc’s, good for 10.62:1.
Adding a mild steel 6 pt bar. Probably about 60 lbs (??)




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