I'm trying to install a tti 2.5"x-pipe exhaust system on a 70 Duster 340 with stock exhaust manifolds and a column shift.The left head pipe interfers with the torsion bar,shift linkage & floor to firewall lip.The engine needs to be raised about an inch to get the pipe to meet the exhaust manifold.the motor mounts are new.Does anyone have experience or suggestions on fitting this system?