I dont remember seeing a full spool option for the 8". Id imagine it would hold up just fine for the most part, its not like you are slamming it with 600hp.
I used a stock radiator. But then again the engine in the car was totally friggin stock.
It was my first turbo Ford, and was made in these places:
Apartment parking lot next to University Mall and also in Oak Ramble
Car wash on Bruce B Downs at Bearss
Discount Auto Parts on Bearss back lot.

It was a pile of crap mechanically. But hey, the thing ran 13s for like 500 bux including the car. It was pretty low dollar, down to the fact that it was running only 15psi of boost, Audi 5000 IC, small vane meter and a 2.5" exhaust. It was probably barely breaking 200hp... Even with that crap, it still ran an 8.10@85 out at Lakeland.