dru34

so im bout to get a 5.3 block for dirt cheap, and was wondering about how much it would cost to get it bored out to a 5.7, its an iron block so it should be fine, and also any input on this subject would be great, and if anybody has one in there fullsize how do you like it, thanks guys

dirt track racer 81

iTrader: (45)

the ones ive built it cost around 350-400 to bore, hone, vatte and cam bearings

53bowtie

iTrader: (6)

Search the internal mods section. There have been several threads started on this topic. If I am not mistaken more than one talked of problems with the block when it was sonic tested. From what I have read it is just a toss up though as to if the block will be ok or not.

dru34

o ok great, and all i would need is the 5.7 pistons, rods and crank(which is the same as the 5.3 anyway right?)

Pontiac Derek

iTrader: (6)

For me it cost 285$ just for the bore and hone, yes you just need the 5.7 pistons

montecarloss

iTrader: (18)

I got all 5.7 pistons with rods and crank out of a 2000 camaro pm me if your interested

max1

iTrader: (12)

let us know.on the build i also have 4.8 block waiting for it 2 get bored to 5.7 ls1

MuzaK

i have a 4.8 as well max and i was wondering, after the bore will u need 5.7 parts ie intake, headers, cam, heads?also what would be the hp difference?

Spoolin

iTrader: (8)

You don't need different intake, headers, cam or heads. But since they are off you might as well get some work done to the heads, get a different cam and intake!

max1

iTrader: (12)

well its all going into a gen IV truck, NNBS intake seems to flow pretty good- and my 243's are ported all the way , and a 228R cam will do . .

dont' have number off top of the head between 5.3 / 5.7 but its more CI - it should easily peak over 400hp +