Re: cam and rocker arms
Stock springs/rockers are usually only good for around .500 or so. I would run some "911" comp springs, replace the rotators with eliminators if it has them, and and run "long slot" rockers(most have an L cast into them). Elgin makes a nice inexpensive set, I believe you can get them from Competition Products. Also, just to be safe, you should check piston/valve clearance. It's probably OK, but better safe than.....well you know.
440ci "Baby" BBC
Big Shot Plate
Getting it done with 10"
2015 Pinks All Out 8-9sec Winner