Connecting rod Issues

Hi guys, I just picked up a barn find vf1000 84 interceptor, the motor has only done 44k but on closer inspection someone has undone #4connecting rod from the crank and not replaced the end cap, not sure yet but maybe spun the bearing as I haven’t split the cases yet, anyway I removed the piston and rod but I can’t find the number or weight code on the connecting rod, does anyone have an idea how I could figure out what to do to get the right replacement, cheers from Australia