sounds like your trying to install a saginaw pump on the car instead of the proper fitting federal pump.
the proper pump for that car has the high pressure line at the left front of the pump. the saginaw pumps (what it sounds like your trying to use) have the high pressure line at the rear of the pump. they were used on the 73-up spool mount cars...
i thought someone (maybe BPE) sold an adapter hose.