I would consider a custom grind cam personally. Also, why a carburetor setup?
I have a cam, pushrods, and springs all from a 5.3HO(L33). They came out at around 40k miles when I did a cam swap. I'll let it go cheap.
1991 Silverado-L33 5.3L, 212/218 .557 .562 115+4, ASP under drive pulley,180* thermostat, 90mm truck intake w/ LS3 throttle body. Shoenfeld conversion headers and duel Flowmaster exhaust. Performabuilt LVL 1 transmission and 23-2500 stall converter.
TR220: http://www.performancetrucks.net/for...d.php?t=473916
Comp Cams 216/220: http://www.ls1tech.com/forums/parts-...injectors.html
TSP Torquer V2 232/234: http://www.ls1tech.com/forums/parts-...s1-brakes.html
Futral F14 232/234: http://www.ls1tech.com/forums/parts-...l-f14-cam.html
230/226: http://www.ls1tech.com/forums/parts-...push-rods.html
Comp 224/230: http://www.performancetrucks.net/for...d.php?t=474146
A lot of guys trying to sell their cams in this thread: http://www.performancetrucks.net/for...d.php?t=474285
Big slow mud truck with a TUNE!!!!!!