dbrannon79
I'm getting there!
I could be wrong, but I think the HB is the same for these trucks SRW and DRW. it's the MC that makes the difference. in pics I have seen on RA and other sites, the fluid reservoir on the 10,000lb + is larger than the one for the lighter weight one. the rod that's in the HB that pushes on the MC may also be different length, but that can be changed without pulling the HB if needed. try looking up on RA for the MC for a 10,000 lb truck and see if that matches what you have installed, they should list the bore size (inside diameter of the MC piston wall) you can measure by un-bolting the MC from the HB and not having to loosen the brake lines.