Thanks for the input guys, i'll let ya'll know on what i decide to do.

 

cheepest way would be to spray it big..grow some ***** and do a 300-400 shot

 

What's the largest bore to do on the 4.8L block? I've heard people boring out 5.3 to 5.7, so is it easily attainable to produce this, or larger, with a 4.8?

 

bore only would be about a .030 or .040 overstock LS1 bore, not sure, but you need the block sonic tested anyways to see how far out you can go

 

once again.... the ONLY difference in the 4.8 and 5.3 are the stroke... same block casting.

5.3 stroke = 5.7 (LS1) stroke

4.8 bore = 5.3 bore...


Get a forged 5.3/5.7 crankshaft, and bore it to 3.898 with forged rods/pistons and give it hell... Good heads/cam/intake will have that thing making nasty power.... dont forget your 10lb insurance policy.

 

I dont want to sound like a moron, but where can you buy forge parts for the 4.8L??

 

I'd forge everything, lighten up everything I could internally, get some killer high-comp heads, a screamer cam, and put it into an eighties Monte Carlo SS with a T-56.

Something about a 4.8L that begs to rev fast....

 

custom for the pistons

not sure about the crank but im sure someone makes one

i bet you could use regular 6.125 rods but not sure at all.

8ALTNG had a fully forged 4.8 so he would know

 

Your going to spend more on machine work, labor, pistons ect than the cost of a 5.3 or 5.7.

 

I'm thinking about just putting all 5.7 internals, mild cam, etc. That's sound obtainable right? Then after putting tha in, take the 5.3 out and do something crazy, perhaps some kinda boost.