i have a dual carb edelbrock manifold with two edelbrock 500cfm carbs. Im either going to go with a 350 .40 over with 2.02 heads that were just redone or a lt1 350 which im sure much about. I have a muncie m-20 with 3.31 posi rear end what cam would go best with these carbs and what motor would be be best. This car is not going to be raced just something to go drive around with some power thanks

Which cam to use will depend on which block you use. The earlier 350 blocks take a different cam from the LT-1 blocks.
I assume you want a hydraulic cam, and the engine is 10:1 or under.
For the regular 350 block, I would use a VooDoo 268, part number 60103. This is a regular hydraulic cam, 268/276 at the seat, 227/233 at .050, .489"/.504" valve lift, and 110 LSA. I have driven this cam a little, and it works very good.
If you go with the LT-1 engine, you will need a hydraulic roller. I recommend the VooDoo 270/278, part number 60121. It is 270/278 at .006, 219/227 at .050, .525"/.530" valve lift, and 112 LSA. I dyno tested the next one smaller in a ZZ4 short block, and it had a very wide range of torque.
They both should work power brakes.....

UDHarold

ChevelleLT1350.

I am glad you posted your question in the Performance section. You have been answered by one of the most knowledgeable guys on this forum.

Bill

I have used that Voodoo cam of Harold's. Very good cam!!!! Very crisp and pulls hard. Its on a 112 so the lope is not there. Has some lope to it,b ut smooths out.

Harold also designed Lunati retro rollers for a SBC. You can check there web site out. These cams can be custom ground on a OEM roller deal. These are nice cams. Harold recommend to me the 501A4LUN I believe. I got that cam custom ground on a 108 LSA. Good cam!!!!!!!!

The voodoo is a billiet cam the other I mentioned are steel.