R3 block

Hi every one I am new to this site I have been racing my 71 Valiant for about five years and have finally blowen up my 360 engine with NOS.
I am now building an R3 block I have a light wieght drag crank 4" strock from Scat Diamond pistons and Eagle rods with the 2000 bolt kit.

Q: Is there any mods I need to do to this block to handle 700 HP
Q: I have ported Edelbrock heads will they work or do I need to step it up and if so to what. I want to stay with my Dual tunnel ram system, I have it all set up with NOS plates, 250 shot

Q:What cam should a guy use (roller) it is the 59 deg block