Both the 4.250 and 4.150 options have the same 2.20 journal. The 4.25 stroke compared to the 4.15 stroke changes these;

Compression height 1.320 to 1.370
Rod ratio 1.537 to 1.575

It's a B motor I'm looking at. Keep going back and forth on this. 20 ft lb sounds like something I wouldn't want to lose. Not sure if the smaller stroke option is worth it for the additional compression height etc or if the difference would be unnoticed. Car will not see many miles on it but job situation is poor (layoffs always around corner) and know I have 1 shot at this.