1970 Duster AlterKtion, 4 Link, LS/T56/Turbo and Minitub
Welp, found the issue. It seems my thoughts were correct, the rod bearings were fine but the main bearings were wrecked. Luckily I caught it before it spun a bearing or really hurt the crank. New bearings will be here today and should have it running by the end of the week again hopefully!