Take it. You can build a strong performance 460 (or even larger) based on that motor. You don't need the early heads, in fact those are great and also are a better choice than the smaller cc heads of pre-1972, if you are going to rebuild the motor, you can get flat top pistons from KB and if you wish to stroke it you can get some dished pistons and be a healthy 9.5-1 in either case.