318 Cam
So, a bone stock 318 with a 4bbl. is looking for a cam. And also, the same engine is going to get a 6pack intake and 3.55's. Correct?
The first issue is low compresion and the second thing is the heads. Are you doing anything about those two items or will they remain stock?
If there remaining stock, I beileve a good cam to think about is a Comp Cams XE262H with 218 @ 050 duration.
If your adding some head work, bowl porting and a milling for some compresion, Look at the XE268H and add a little stall to it.