I think that other 50 horse will be there without a lot of chasing.
Say that because of a similar type build i had
416, W5 heads, 11.5 compression, 260/266 flat tappet, 597/623 lift. “ standard” ringpack.
Brett Miller modified Victor W2 intake. 1 7/8 TTI W5 headers
In a 3350 pound A body that combo ran 10.30’s @ 129 ish.
Broke the cast crank and tore up the shortblock late that season
The next season i took the same heads, headers, intake, carb etc on top of a 422
Difference was 043 ringpack, 273/280@ 50 roller that was 699/672, and 13.3 compression. Roller wasnt a spring killer, i drove that everywhere.... springs were 240/590. More aggressive profile later on made more steam on that combo
Changed nothing else on the car, just the shortblock
9.85@ 135.............. not sure what that difference was, but its more than 50 horse.
This is a car i raced year in , year out for a long time
I think the TF heads would show less difference than above, because they aren't as “ big” but i bet they would show 70% or so of that difference
