@NOS
If you don’t want to through your precious money in trash then don't go for any project with that old Mark-II.
As per @Spectra comments suspension is horrible. You wont find new suspension or even used in scrap markets.
2nd thing the bay of Mart-II will not support a V6 or a V8 engine, you have to go through a lot of cutting all over.
I have seen one recently swapped with 3C Diesal Turbo, car is still under construction and no chance for quick rehabilitation. Even for 3c there were a lot of engine mounts moved here and there.
Look for any old celica or any car other then Mark-II 1973