Thanks for the response. I had another question related to brakes. My grandfather had purchased spare wheel cylinders about 20 years ago from NAPA. UP 6353 - Bore Size 1 1/4 & 1 3/8. Wheel Cylinder Line Thread size 7/16-24. NAPA lists this fits, front, back, left or right for Dodge trucks 37 - 40 & 47's. UP 6354 - Bore Size 1 1/4 & 1 3/8. Wheel Cylinder Line Thread size 7/16-20. NAPA lists this fits, front, back, left or right for Dodge trucks 37 - 40 & 47's. My question is, which one is for the front brakes and which one is for the rear? I am assuming UP 6354 is for rear with the coarser thread size. Also NAPA lists UP 7 and UP 6 as Wheel Cylinder Repair Kits. Which is for which cylinder? The UP 6 spring looks smaller than the UP 7... so I assume UP 6 is for the rear. Sorry to waste peoples time, but I am hoping that someone has this readily available to answer. Thanks. Looking at ply33's website. He lists 830231 as rear wheel cylinder repair kit which references to Raybestos WK6. This kit looks identical to UP 6. Hi lists UP 7 as for the front. So my only other question is which cylinder kit is for the front and which is for the back?