edelbrock rpm heads 202, do I need to notch the pistons

Since they're the 2.02 valves, you'd be advised to notch the pistons. You can do it yourself, get an Isky Racing Cams piston notching tool and you can do it with the engine in the car.

Cam choice depends on what you want out of the car. Is it a daily driver? Will it be smog checked? What intake and fuel system do you have? What tranny and rear end gears do you have?

http://www.iskycams.com/onlinecatalog.html

Click on that link, and look on the left side and click on Tools & Kits. Then page down one time and you'll see Notching Cutters.

About the cam, I'd go with this one.

Comp Cams Magnum 35-312-8, grind number 276HR. It has .544/.560 lift, 276/280 duration, 220/224 duration at .050 lift, a 114 degree LCA and a powerband of 2000-6000. It needs a 5 speed or a 2500 stall speed converter if used with an automatic, and everything else it needs you already have.