I have a similar 512 combination. My 69 Dart is 3500 pounds with Driver. Indy EZ heads opened to max wedge size ,Indy intake ,1050 , one of Dwayne’s solid rollers 268/270 duration 646/646 lift,11.2 to1 compression,Ultimate 9 1/2 converter. The car has Caltracs and 410 Ratio with 10.5 x 29.5x 15 radials. Yesterday it ran 9.86 trough the mufflers at 134.I think it would probably do 9.70 uncorked with a little tweaking, but its time to slow it down a bit.