I tried to find pictures posted of this area while it was raining last night but could not find the one I am thinking about of a forum member's restored B-4 with details ya need...I was able to stick my head under my near-stock Spring Special and it has a similar bracket with a broken clamp rusted to the exhaust pipe less than an inch away...this truck was used off-road quite a bit and bears the scars of high-centering a few rocks and possibly hanging a railroad track, so my guess is that if you can attach your exhaust pipe to it, then you're gold...it's not on the B-1s or B-3s in the yard, and the factory parts manual is not much help as the B-4 down pipe is omitted, but the early B-1 down pipe is separated by serial number from late B-1, B-2 and B-3 down pipes...my guess is that bracket was added on B-4s to address some vibration issue with the down pipe, but ya might not need it as evidenced by its lack of use on previous models with the same powertrain