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.
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I have a similar engine that I bought of FB that was stuck. I just got it apart and got it unstuck. Could you please post what you did to you other engines as far as pistons and cam? TIA.