Saw looks fairly clean. I'd fix it. The oil to gas is an epoxied plate in the oil tank
that once the cases are split you can reseal.
JMO: That plate falls out because the cases were painted before it was glued in.
I Dremeled off the paint before JB welding it back in my 655BP.
A pair of #4-40 screws wouldn’t hurt either. [emoji848]