Hey Tim, That's a good idea to use the old lines to pull the new ones through. However it's not that difficult to access those oil lines. They are "T"ed off the port used for the oil pressure sender on the back of the drivers side cylinder bank. They are attached to the top of the turbo housings with a 5/8" banjo fitting. Be sure to replace the crush washers to. If I were you I would remove the old lines and send them to Callaway Cars for exact replication. Mine are steel braided lines with pressed fittings- not like the Earls "an" style. Since they are leaking replacement should be a priority- If one of those lines ruptures the turbo's would suffer oil starvation very quickly, so would the rest of that wonderfully crafted engine! Once Callaway Cars has the line's in hand, if you ask, they can turn them back to you within a few days. Good Luck on your repairs! -Joe