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At this point use it as a learning experience, and only continue with a rebuild if you actually want to spend the money and time to get it done. Otherwise, get a running engine and replace the old one. You will need (as per parrots post and mine above) to measure all interfaces requiring new parts. They were within tolerances *once*, and that was coming out of the Toyota factory over 40 years ago. Every time it has started since then it has gotten further and further out of tolerance. You literally have zero idea what the state of the engine is unless you measure these interfaces. Not being nasty and just trying to state facts. I would use the factory manual, you can obtain a copy easily enough. Try this link. You will need a micrometers or varying types. I would recommend a set of vernier calipers and a bore dial-indicator at the very minimum. Let us know if there is anything else you need to know. This is a process I have done myself many times and the simplest/smallest oversight will lead to an engine that eats itself within minutes, hours or weeks. Cheers - boingk EDIT: Sorry, I didn't see you had the block and head at the shop. Good move. You will need bores machined most likely and you can get the head skimmed while its there. Being only a small-bore 4cyl it shouldnt cost too much.

This is something you need to have done by someone who knows what they are doing. Otherwise you are going to have a disaster. By all means have a go at putting it all together (use a factory manual) but get the block, crank and rods assessed by an engine builder and let them order the correct size parts for you.