Is it possible to put GSR pistons in a 1990 LS engine without any problems? If so, how much compression would I gain and what would this equate to whp wise? I was wondering because I want to bump up the compression of my 9.1 motor into the 10 area (10-11) so I can get a few more ponies out of her without switching gas. Also, would this be a good setup with a LS head that will be shaved and port/polished in the future? If not, what would you all say would be a good setup without going VTec or boost or Nitrous and staying safe with 93 octane?