I just put a 4" lift on my '88 and need to reroute the exhaust so it doesn't hit the front driveline when I drop the t-case... Anyone know how many inches the exhaust Y-pipe should be located underneath the front driveline to clear the added susp travel? Should I keep the same path or go another route? Can I drive w/o the front driveline installed until I get to an exhaust shop?