I'm trying to forget the Excel bit, thank you very much.
I was going to build a car and run RRR, but this new series for next year sounds awesome. I'm a bit worried about building something that might not be in the new regs though. 4AGE in a Corolla should be OK. There was a KE70, 4AGE 20v, aftermarket ECU, Supra box, T18 LSD on Ebay a couple of weeks ago. Sold for $3,800. I cried. That's what I'm sort of going towards. Just the 16v is an easier swap at this early stage.
Anyway, I've heard mention of the T series diffs, but thought they might be a bit hard to source, not to mention the cost of a genuine TRD LSD. Any ideas on availability of the T18 stuff?