what size cam
 

would a lt4 gm performance cam be good in a stock 5.7 vortec motor or what would be a good cam. want something for low to mid torgue range not for drag racing. will be running a 2 barrell carb and 5.13 rear gears

Call a cam company and they'll ask you EVERYTHING about your combination.

If you already have a cam, try it.