Do you have any new shots on the engine bay? I'd like to de-smog mine as well but I'm not 100% sure what all I can remove. Any pointers? I've already removed my A/C because it doesn't work, and I'd like more room in the engine bay, and free up a few hp.

Any photos of this plate that leaks?

Do a search. There's an entire multi-page thread on desmogging a 22R, which won't be so different from a 20R.

I hope you don't need to sell it! I can completely understand the need, but hopefully you won't need to. I just bought a 78 (full size, no pop up), and I'm pretty excited about it. Somewhere you can find a gasket for the coolant. Whether you buy gasket material and cut it to fit, or you ask someone to fab something for you. There are people who can do this for you, I have no doubt.

If that's the only thing keeping it in non-running condition, and if it's the non-running condition that's the justification for selling it, then come on man! :) You can get that thing fixed. Then when someone else runs into this, you'll be the guy posting the solution for them.

Any photos of the interior? Those pop tops are quite a bit different inside than mine.