Hi all my fiberglass 31 ford pickup is almost complete and have begun to drive it. I have a driveline vibration very fast ,so assuming driveshaft. I went to spicer website and used their calculator and this is what I have, tailshaft is 3 degrees down, pinion is 3 degrees up and driveshaft is 4 degrees down toward tailshaft. It gave me a operating angle of about 7 degrees, from that it said it was good to 2500 rpm. My question is I can’t raise the tailshaft any , but is there anything I can do to correct or make the angles better or at least bearable? Thanks in advance, Jim Sent from my iPad using H.A.M.B.