sevenzeronova

I am looking at converting to a new engine. Which is the better choice ? Rods difference? Wrist pins, piston?
Are there better heads to run from one or the other?
Planning on a S476 87mm 110 AR billet wheel. And holley hi ram

z28SSilvest

Go 6.2

nascarnate326

iTrader: (1)

Pretty similar. Your going to make more power with the 6.0 but the 5.3 will easier and cheaper to find.

Personally I would go with a 5.3 but most go with the 6.0.

As long as you get an iron block you should be ok for some boost.

dhctss

iTrader: (3)

I would do a 5.3 and throw a huran speed kit or on3 turbo kit . Thats my plan when my engine ***** the bed. For like 4 k you could have 500 to 600 rwhp realiably and much more if desired.

KCS

iTrader: (20)

5.3L engines are probably easier and less expensive. I've picked up complete 5.3L engines for $400, but the last 6.0L shortblock I bought was $350.

Look for a later model 5.3L with the stronger floating style rods.

y2k_ta

iTrader: (80)

Don't count out the 4.8L for boosted applications. If you are set on a 5.3, make sure you are actually getting a 5.3 and not a 4.8L. They share the same block, and are marked with both displacements. Pull a head, and look at the pistons. Flat-top are 4.8 and domed are 5.3.

Zac_Speed

iTrader: (4)

Hot Rod Magazine made over 1000hp with a 4.8 and some factory parts..

MonmouthCtyLS7

iTrader: (6)

Big difference would be cost...you can pick up a 4.8/5.3 for dirt cheap locally or Ebay..Costed me under 2 k in total for the motor, fresh machine work, and forged rods and pistons for my LY5.

KCS

iTrader: (20)

I don't think any stock engine has domed pistons. I think you meant dished?

Anyways, another good way is to look at the area with the 4.8L/5.3L embossment and the displacement should be marked with paint. For example, a 4.8L would have a shot of paint on the 4.8L embossment.

408-99-f

+1 for the 6.2L love mine. But mine is also a n/a motor. If you are going boost, and are on a budget. I would research getting a 5.3 and run 6.0 heads. I think I saw this set up in a 1500.