i'm not even sure. the vette that the heads came from had a .670 lift cam in it, so i'm confident that whatever springs are in there can handle my .612 cam.
just spent my last big chunk of change on this thing. innovate MTX-I wideband, mandrel bends to finish exhaust, mufflers, tach, software for my transmission controller, trans temp gauge, pillar pod, trick-flow diff covor...basically everything to finish the build. i sold my holley 750dp and i'm waiting on my quick fuel 850 DP to come in. i really hope to be able to drive it to the SAR shootout. i see light at the end of the tunnel!