really, no ground to frame? I coated all ends with dialectric grease then doused it with fluid film..well see how it holds up. Still need to ground my body to frame actually,Its just sitting on those pucks completely isolated
as for number,s im jsut using a calculator i found online. from what i remeber those seem to be similar rpms i was turning
I should have specified, I meant do not ground your lights and trailer harness to the frame. Since you said you were doing the rear lights harness, and then mentioned ring terminals for grounds, it appeared to me you were planning on grounding said lights to the frame - which you can, but eventually it will fail you, likely while you have a state trooper tailgating you
Also, you did ground your batteries to the block as well, right?
As for the online calculators, don't trust them completely. They assume a 32" tire stays 32" all the time, which it does not - once the weight on the truck is on it squishes a little, so while from the center of the hub to the top of the tire it's still 16" if you measure from the center of the hub down to the road surface you'll notice you've lots about an inch and are now measuring around 15", which would therefore act more like a 30" tire. When running calculator numbers for 235/85-16E and 265/75-16E tires I always put 30" as tire size and it usually comes out dead accurate. Don't know how your 37s will measure up, but just assume you'll be running 100-150 RPMS higher than what the calculator tells you, and that should be about right.
Oh, one more thing - put some fender flares on! With the tires sticking out like that, the first time you drive down a muddy road the whole sides of the truck will be covered in the nasty. That includes mirrors, and door handles. Both are kinda important you know