99Bluz28

iTrader: (35)

Yeah your best bet is to focus on a cam with spec within this range: 218-221 for the intake lobes, and 228-230 for the exhaust lobes, and a 117 or 118 lsa to help keep the overlap in the -8* to -12* range I'd stick with a fairly mild exhaust lobe for a quieter(stealthy) valve train.
You're most likely looking at a custom cam.

redtan

iTrader: (5)

A high 220s cam will have a different idle that stock, most gearheads will be easily able to tell you have a cam.

99Bluz28

iTrader: (35)

Normally Yes, but not always. You might be able to tell by the sound if a engine has a performance cam in it or not, but not size/duration of the cam. You can have 2 cams with exactly the same lobes, lets say a 227/227 but one with a 110lsa and the other with a 118lsa. The 227/227 110 lsa cam will have 7* OL and a very clear cam lope , and the 227/227 118lsa will have -9* overlap and have a almost stock like sound. These two cams will not sound the same at all.

A.R. Shale Targa

iTrader: (2)

based on 119.85 trap speed I'm probably at or near 380 rear

Mavn

iTrader: (3)

Got my 5.3 short block!

redtan

iTrader: (5)

If you're going with a sleeper setup, why did you go with a 5.3 and not something bigger that will make more power and look just as stock?

Mavn

iTrader: (3)

Got the 5.3 for free! ^

GMRL

I see your a fellow Texan!
I would at least try to paint the short block with some silver or aluminum looking paint while its out.

Mavn

iTrader: (3)

Yeah will do! Gotta clean it up tho! It's a dirty ****** lol