scenario: LT1 stroked to 355. What parts change the compression ratio? Pistons? rod lengths? Head combustions?

 

combustion chamber size, piston dish or dome, gasket thickness... probibly more

 

^^Corrected above, but Mortify has the right idea.

 

thanks for the correction...I'm just trying to set up an engine build, but don't know if I want to go with NA w/nitrous or supercharged.
plans include forged 355; AI or LE heads and cam; 58mm TB with ported intake...

 

N/A and FI will require two very different builds. Have to decide now on pistons and heads primarily, but plenty of other things too.