Swt SS

I have a lm7 5.3L bored to Ls1 spec's...can I still use 5.3L internal parts in the now ls1 5.7L?

bww3588

iTrader: (49)

After everything is rebalanced. Yes

N20zuki

Pistons are no longer the same.

Swt SS

so I can all 5.3 internal parts except the pistons which have to be 5.7L ?

2000PewterT/A

The pistons have to match the bore, you will be able to use the rods and crank from the 5.3 but the pistons are larger for a 5.7.

trjk07

You guys probably will fry me for not looking his answer up but I'm not savvy to this site. I have a 04 5.3 with .588 cam around 114 lobe sep. with I believe 228 duration. I want to put these 806 heads that have been ported and 2.02 intake valves on the 5.3. Anyway to trick some compression back with a gasket instead of milling heads. I guess the heads are 66cc?