How bad did I screw up

I just finished tearing it down to a bare block and got it all cleaned up. Appears to be high mileage and standard bore, came with 452 heads, and a windage tray which is a first for me. As far as the water pump housing hole, I’m probably just going to ignore it. I feel like 2 of the 3 bolts will hold it fine. If it leaks I’ll drill it further in and tap it.
Not sure if I’m going to do a full build on this one or just do a basic piston/cam build like my other 440s.

Here’s the truck it’s probably going in.
View attachment 1716069021
Cool truck. Ummm...where did you find it?