Motor mount bolts

[JAM1777]

Hi everyone, i recently had someone put a new oil pan gasket on my truck and he couldnt getit to stop leaking cause the pan was warped. So i took the truck back and ordered stock replacement oil pan and new gasket ect. Had to remove motor mount bolts to raise front of motor to slide oil pan out. And noticed one bolt was loose and the other was in crooked not even in right. I was upset that the guy that worked on my truck did work like this and didnt even say anything. So i took the old pan out put the new in and noticed that not only was onebolt loose and one was crooked but also one was a 9/16 and the other was a 5/8 the 9/16 was the loose one and it was stripped. So does anyone know the proper bolt and size are supposed to be used for the motor mounts on a 1969 chevy c10 350 small block??

Thanks for any help