83-90 318

I pulled the seized engine out and opened it up, it’s stamped 81, so it’s not original. It’s got open chamber “593” heads. And some aluminum pistons that look like they are standard bore.
The engine out of the ‘90 has 40 over aluminum pistons and “302” heads. It also has the fuel pump thing y’all were talking about on the front of the cam.
I think the only reason the ‘81 is seized is because it had water in the cylinders and rusted them. I’m debating on if I should try and pull the bottom end out of the seized engine or just junk it all.
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