WOW been there done that. 572 (4.50 bore 4.50 crank)

When I went to order my Callias crank from Dan at Performance Only racing he tried talking me into going with a Chevy size rod journal. I didn't because I already had a set of high dollar Crower steel rods in Mopar size that I wanted to use. Like you I assembled it and went to slowly turn it over and BAM, rod bolt hit the cam. I tried three other cams I had sitting here with zero luck. I tore the short block down and bought a set of K1 rods and had the assembly rebalanced and all was well. The old style rod bolts wouldn't clear but the new cap bolts did. This Spring I had the crank cut to Chevy size and changed up to a nitrous friendly combo with aluminum rods. Everything clears great now too and hopefully will hit the track in my small tire car.