The 361 and 413 industrial motors had the standard B/RB 3/8 rod bolts and nuts.
The OEM street hemi rods have 7/16 bolts and nuts, some of the race only hemi rods Mopar use to sell had 1/2 inch bolts but I wouldn't consider them in any low RPM pulling motor for truck or motor home use
Why add useless weight like that to the rotating assembly with those really heavy pistons