Is anyone running this set up? Have you towed heavy? I have a 350 drw 4x4 that I thought this would be great for if it worked and held up. The truck has 4.10s now and my plan would be drop the ratio to 4.88 maybe even 5.13 and with the gear vendors od at .55 I would actually have a higher top end than I do now along with a stupidly low first gear. Any thoughts ?