what radiator are you running in your zuk? im having a time finding one that will fit and keep the 4.3 cool at the same time.,,,,thanks

I had a rad shop build one.
As big as you can fit. My suggestion is 3 core aluminum.

from head light to headlight, and frame rail to hood.

But if you find one let me know ;)

I have built 3 sammys with 4.3 and used differant radiators every time. 1 was a v6 4 runner with the outlet and inlet switched from one side to the other this one cooled the best.
Also used a vovo radiator and one from a monza or something like that. hope this helps:D