I might be getting an Ls block from a buddy with the choice of LS or GSR pistons and rods.

The motor is going in my wife's Del sol and will stay naturally aspirated, with just a header, exhaust and intake.

This has to be a VERY low budget build with no money to spend on machine work or extra parts.

So, which pistons/rods combo should I go with AND why?

Thanks, for any help or suggestions.