with a solid roller it is better to have more than you need than not enough I am running 340 at 1.900 and am over 700 at just before coil bind.

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