My 4 banger, '02 Camry has 140,000 miles on it, with somewhere around 25,000 pulling my 8 ft woody teardrop. No trans-cooler, but keep it serviced at suggested intervals. I shift down out of overdrive when on mountain grades and cruise right along with the truckers on the interstates. Works for me. Good luck on your build, remember, pics, pics, pics.

Roly ~~