silveradojunkie13

I know I posted earlier about boring a 5.3 to a 5.7. I think that's what im going to do. I have big plans for it and a lot of questions. I was planning on putting forged ls1 pistions and rods because I wanna boost it with a turbo or twins, what would be a good intake to use? and what would be a good set of heads to use? Also if I put a different intake like a ls6 or something what modifications is required?

RezinTexas

you're asking a lot of very general questions with no background or statement of goals, so its difficult to give specific advice. however here is what I would do with the information presented so far:

Assumptions:
GM truck chassis setup for Gen 3 motor, wants big power with turbo(s)

My advise for this situation:
6.0 block with light bore/hone
Factory crank
Forged pistons/rods
Ported 243 heads
Patrick G custom cam
TBSS intake

I would not mess with the stroker for a turbo application.

Hope this helps

quicksilverado

iTrader: (8)

Stock heads and truck intake will make plenty of power with a turbo.

batboy

iTrader: (6)

If you are making the 5.3 into a 5.7, then use 243/799 heads (they flow better and have bigger intake valves than the stock 5.3 heads). Changing to a LS6 intake might help a little with higher RPM HP, but there is nothing wrong with the truck intake, it makes good power, in fact it has better low to mid range torque. Plus, you'll probably have to change the front accessories around with the LS6 intake. Here's a thought, have your truck intake ported if that extra 10 ponies is that important.

69Camaro427

Keep it simple! Example buying a LSX intake for $1500 for 20 hp not a smart dollar to hp ratio, verses buying a complete cam kit and 243 heads for $1500 for 50 hp

I don't see a problem in turning the 5.3 into a 5.7 minus the extra cubes of the 6.0. but if you already have the 5.3 then the money spent on machine work would be close to buying a 6.0