wow I dont know about all this I have a 14-1 416 race motor with a solid roller with 267/272 @ .050 with 690 lift it idles nicely at 900rpm and I could drive this on the street all day with 0 problems.

70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake

best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4