Looks like you already have a big job going. I'd get it back together and driving then you can find out what else you need and do the repair items before doing mods.

But if you pulled the subframe for the engine job or just while the engine is out I'd go ahead and do the powerflex control arm bushings as they are always worn out.
https://www.waymotorworks.com/powerf...shing-kit.html

 

Partial list of other items you might want to inspect / replace
1. knock sensor seal (common oil leak)
2. front and real main seals (common oil leaks)
3. intercooler gasket set (dry rot and split)
4. Coolant reservoir (if it is plastic and yellowed, then best to replace before it leaks)
5. control arm rear bushings (if not already replaced, they are bad)
6. belt tensioner and belt (inspect and replace
7. if you do the timing chain the VVT solenoid.

There are tons of other parts to inspect and replace as needed (suspension, hoses, power steering pump, tie rod ends, etc.). recommendation is to get it running as cheaply as possible and drive it. You can then decide if you want to plow more in parts you are talking about.

All service work is time consuming on this car and, depending on your patience level, you may decide to unload it after you wrench on it a bit. You can always sell a running car . . .

 

If it was me ..I would do the bare minimum to just get it up and running and driving. Once that's out of the way, then you can start modding it. I picked up a nice 05' Audi A4 quatro with a dead cylinder (no compression) for $500......I'm doing the same thing ....getting it running and driving first...then go from there.

Sounds like a fun project....a mini for $300 is a steal!

 

 

 

There's an extended recall on the power steering pump. I bought mine used with 47K miles in March 2017 and they still honored the recall. Check with your local dealer.