I hear you, my Celica sat in my garage for 4 months until I could afford all the parts needed, but I wanted to make it dependable too. I figured since I had it opened up, I’d do the most I could do with the finances I had at the time, I’m glad I did. That oil cooler ran me about $10.00 at a junk yard. But spent about $20.00 for the threaded tube for the filter. Good luck in getting your Celi back on the road, they are fun to drive!Replace your Oil Squirters, the original Squirters require higher oil pressure to activate, Get the MWR Oil Squirters, they are much better, and replace the oil pan from a 1ZZ Engine because those pans have a oil baffle at the oil pick up to avoid oil starvation on hard cornering. The 2ZZ engine oil pans are just a cereal bowl. Get the Billet oil pump, don't replace with the sintered metal oil pump. A new TRD oil cooler would be a consideration. I used a used oil cooler off a 96 Camry, but ordered the threaded connecting oil filter tube from Japan. I've never had any problems with it, my engine never gets hot and it cools my oil down. Much cheaper than a TRD oil cooler that were standard equipment on overseas Celicas....Just my two cents worth.