TurbopigB4C

iTrader: (5)

Is it 3.78" and are there any good budget forged pistons for them made by anyone?

Steve01SS

iTrader: (43)

Some 5.3 blocks can be bored out to accept 5.7 LS1 sized pistons. Depends on the block. Should be sonic checked.

I believe Wiseco makes 5.3 sized pistons now. Not super cheap though.

TurbopigB4C

iTrader: (5)

The only ones I could find were the Wiseco at Texas Speed and they run 700 w/ rings which isn't horrible but still not as budget like I really would like. The only thing that I am a bit worried about is that the largest dish I saw was -7cc which w/ the 243 heads I have that ave been decked and a gm mls head gasket my compression will be around 9.5:1. I am going to run e85 so its still doable but I would rather get down to 9:1 for my turbo application. Custom piston sets are pricey but in the long run might be better.