Keep it simple and pay your attention to the oiling system (we'll happily help you,we bulid a half dozen or so a season ) Olds work well with Mild cam ,8.5 to 10.25 compression , dfdp 750 Holley ,msd dizzy and Edlbrock performer, Big (10 qt ) oil pan, oil resticted upper end and high pressure low volume O'pump . I'f you keep the RPMs below 4500 K and drive it conservetively you'll have a ball Good luck and welcome!  JBP

Bringing this back from the dead, I'm thinking about picking up a 455 for my SJ.  What kind of power can you get from the combo you just listed?  Have any cam recommendation for an otherwise stock motor with a performer intake and mentioned carb?