I have used forged flat top 307 SBC pistons.
Low compression ones & higher compression ones.

These are the higher compression ones: http://www.ebay.com/itm/L2314F-PISTON-TRW-FORGED-060-OVER-NON-COATED-SKIRTS-/311097672858

Lower compression ones:
http://www.ebay.com/itm/307-CHEVY-FORGED...748&vxp=mtr

The lower compression pistons have a design that will expose the top ring more so over the higher compression pistons do.

You can use either one IMO.
I would use the higher compression ones, if you have the choice, but the lower compressions pistons will work fine for the power level you are looking for (not much boost needed)

I have used the lower compression 307 forged TRW's & ran a lot of nitrous though the engine & had a lot of bad detonation going on at times & they stayed together just fine..

MBHD


12 port SDS EFI