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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.

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Most of the off the shelf Mopar stroker cranks I've heard of with the 4.150 stroke use the Mopar 2.375 rod journal sizes I've bought several(5+ so far) of them to have them offset ground to both 4.25 and 4.300 strokes with the BB Chevy rod journal 2.200 size My last 400 low deck stroker had a Chinese 4.150 RB crank cut down to fit in the block on the mains, counterweights and I had the rods offset ground to 4.300 stroke, that baby flat rocks