Wat cam should I go with and gears for my 5.3 silverado ext cab
On cam there is two that I am looking at 218 228 550 588 112lsa for $370 with springs and push rods or
A 228 228 588 588 112lsa with springs and pushrods for $550
And gears 411 or 430

 

what truck? 4wd or 2wd? tire size? what will you be using the truck for? ex cab, crew cab or single cab? are you willing to run a decent sized torque converter?

 

Try searching. There is TONS of info about cams on here. We need more info on your set-up and what your overall plans are before we can even talk about cams.
Try answering some of these questions:
Built trans or stock?
What converter?
tire size?
daily driver or weekend warrior?