Oil pump and pan repair suggestions.

[29closedcabguy]

First let me confess, I've been a lurker till now. Even when I was a member years ago when I had a 52 f1 with a flathead. I love and appreciate this site. I've found that by searching I've been able to find answers already posted for almost all of my questions, and by reading the posts every day I've found answers to problems I didn't know I had. That being said here are the first 2 of my problems I have ideas on how to handle/repair but looking for suggestions on. I dropped my oil pan while doing an early 90 mandatory maintence/services. The pan had very little sludge and only 2 very small slivers of babitt, but I did find 2 other problems. 1. The drain plug hole has 3 cracks that 2 of them run through the threads. One is visible as a small crack on the exterior of the pan. My plan is to try to clean and try to solder the cracks and putting plug in with some thread sealant. 2. When the oil pump came out with the pan the casting where the locating pin is is broken. I did not find the pieces in the pan. The pin is still in the block, the pump fits back in with no twisting or lateral movement (wondering if previous owner installed it this way as it appears to be enough area left to work). Suggestions for possible repair appreciated