Yup that’s good advice. Anything less than 5.13 isn’t worth it even for 37s. The lowest I could find was 5.38 for the front. So I matched it on the rear.
The master I have now is from a 1996 ram 3500 van. Plastic resi so it’s small. Believe it’s 1-1/8” diameter? It’s barely enough. A bigger one would be better. It was an easy fit though. I extended the push rod in the booster about 3/8”, i unthreaded the pushrod tip (you’ll understand when you’re in there) and used a 10x1 bolt (fine thread 10mm bolt that came off the truck somewhere). Rounded the head down and threaded it in just right. Mounting is easy, I ovaled the holes on the master a little and it fit right on.
So...I found sticky trep 42s for pretty cheap....
Thanks for the input. I will at least run the 513's. Do you run yours on the highway any? I will be using my on the road too. So I still wanted to be able run run the interstate. How did you handle the ABS? Did you just unplug it?