Keep in mind, you just need something that runs, clean the other two holes up, and put it together with file to fit rings.
I done this alot of times when I was a kid and could not afford a bore job or pistons.
I am a junk yard type build person, I am getting ready to build a twin turbo, el-chepo build, out of an 318, the engine has siezed from sitting.
Plan on just getting it freed up, tank the block, new cam bearings, polish or turn the crank.
Dingle ball hone the cylinders.
File fit the piston rings, with extra gap for boost,
I have a stock set of J heads, that will have a nice valve job.
The same summit cam you just sold.
I will have less than $1000 in the engine, minus the turbo stuff.
I am doing this just for an experiment to see what I can get away with, before building one of my good engines.
I am going to try to blow it up. But it may stay together if I keep the boost under 10 lbs.