340 stroker crank

I HAVE A STEEL STROKER CRANK, 3.825 STROKE, LIGHTENED , KNIFE -EDGED, CHAMFERED,CHROMED JOURNELS. STANDARD ON THE RODS, .020 ON THE MAINS. ALSO I HAVE A BRAND NEW SET OF ALUMINUM RODS, LENGTH IS 6.550. ISTON PIN SIZE IS .927,THIS info was given to me when i the crank and rods to my local engine building shop. he also mentioned that with the longer rod- the rod ratio would be better than the 6.123. i bought these items and a solid roller cam and solid roller lifters. the estate i bought them from said the orig owner planned on building a circle track motor. the cam and lifters ill probably keep to install in my 418 this winter. 3.825 is stamped on the front of crank. im located in ballwin,missouri, 63011. the engine builder said the crank needs a light polishing . i should have pics tommrow. im wanting to sell crank and rods togther. im looking for 700.00 shipped to lower 48states. im no expert in measurements, thats why i took it to the engine shop. yes this will require custom pistons.