Sam-eye-Am

iTrader: (2)

I know a couple of people have opened the 5.3 blocks up to 3.905 bore with success. Has anyone attempted to take one to 4.030? Is it possible?

5.3LJimmy

iTrader: (10)

I have seen a few posts saying it has been done, but I have seen alot more saying it ain't possible. You could have it sonic tested to see just how much meat there actually is. It would have to be a pretty substantial amount to allow boring out 0.251".

KrisXpc

iTrader: (13)

good question..

ALLBOTTLE

iTrader: (13)

it would be cheaper to buy the 6.0 block, even if it can be done by the time you get it bored out that far you will be a couple 100 in labor alone if not more.

jmm98LS1

iTrader: (28)

^^^Agreed. I picked up a lq4 shortblock minus 2 rods/pistons for $200.

nobreaks254

iTrader: (50)

I would have to say it isnt possible. I had a 4.8 block (same block as 5.3) bored out to 3.898 and it looks thin already.