I have recently purchased and 89 suburban. I have installed a 4 inch front springs and 4 inch rear spring with a 1 inch block. The problem I have is that now the front drive shaft is to close to the crossover pipe on the exhaust. I think someone mentioned a 1 inch front drive shaft spacer in a forum at sometime. I believe if I space the driveshaft forward 1 inch it will solve the problem. Does anyone know where I can get this spacer? Thanks in advance for your help.