thanks Andy , so there was 25HP gain with the bigger head , same non MW intake . I presume there may be more with a 496/505 . Even if a little less exotic build than yours .
Tex
New best ET 10.259@129.65 . New best MPH 130.32 Finally fitted a solid cam, stepped it up a bit more 3690lbs through the mufflers New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm Power by Tex's Automotive