magnum block/ LA questions

Bomber nailed it. You can't mix flat tappet and roller cams and lifters and you can't use LA heads on a magnum block even with oil through pushrods cause LA heads oil to the rocker shafts. You'd starve them and cook them real fast. The Engine Quest (EQ) heads bomber mentioned would be your best bet if you need heads. Their a real decent low cost head. I'm running them on my 408, although they've had some port work and a custom valve job. In my Cuda I have ran 12.24... Not bad considering how mild it is and running street gears and my car is a heavy pig