the L-36 and L-26 Pistons are less dished for higher compression, this makes it a very common practice to do a "Bottom end swap." this allows the some 9:1 higher compression ratio of the N/A 3800s... HOWEVER consider this, the connecting rods on the L-36 and even the L-26 are not as heavy duty as the L-67 L-32 engines. if you start pushing 500HP or 350 with high revs you could be dealing with broken rods or spun bearings!
my advice if you really want too push power, go with a L-67or L-32 bottom end for a budget, or "race prep." your own, you can get high strength connecting rods and ceramic coated pistons through ZZP, and you can get the crank and the rest of the assembly balanced so then you can have the higher power rating and revs and not worry about spinning a rod, then you can compensate the compression for higher boost.
