What to do with my 360 magnum??

Did the one hole elongation gob.Easy.IIRC,the R/T 10 cam is roughly 2 steps larger than stock. Nice idle smoggable. Might want to check the valve springs required. Stock Magnum springs are pretty weak,even new. Using the hughes style retainers,you can safely go .510-.520 lift.(to clear the valveguides safely).