Indy EZ, talks the talk, walks the walk.

A 440 with EZ heads flowing 330 cfm @ .550".

.040" over 440 for 446 ci. Comp Cams XE285HL 241/247 @ .050, .545/.545 @ 1.5 using solid lifters and 1.6 rockers, 10.4:1, 500 lb-ft from 3500-6000 rpm, 548 tq peak, 507 HP @ 4900 rpm, 542 HP @ 5200 rpm, 595 HP @ 6500 rpm. Indy single plane, 1140 cfm Pro Systems Dominator.

Same engine with a Racer Brown roller cam from 1968. 500+ lb-ft from 5000 rpm to 6800 rpm, 502 HP @ 5000 rpm to 658 HP @ 6700 rpm.

I guess those heads work okay..........