I have a bryant Model 655ANX042000AAAG
Serial 1396G10284.

Overall the unit is in great shape no leaks, but has just experienced a compressor burn out. Currently installed is a Copeland 42K recip compressor. The base of the unit is stamped and drilled and tapped to take a scroll compressor also. I would like to use this unit to cool and heat a smaller space therefore, would like to install a 30K scroll compressor. I know that the efficiency will be increased if this can be accomplished. By downsizing the compressor, shouldn't I also reduce the size of the piston orifices? (indoor evap coils and outdoor evap coils). Any help or suggestions would be greatly appreciated.

Mike Gibbs