How accessible is the reservoir, it may do to make a workaround by rerouting
another pipe and use t-pieces or r-pieces to splice the pipe in leaving the
old broken pipe redundant but creating a water circuit.

Most motor shops over here do r pieces or elbow joints that fit primarily
for use on fluid pipes and I guess you are from across the pond and there
you can get anything.

I suggested the T piece as you may have headlamp washers and therefore
inserting an R piece will close the headlamp line down.

As long as you don't route it near hot or moving parts and use cable ties
with a foam insert to stop crushing, no one would be the wiser if you hid it
well enough.

Also look to corresponding faults on later Ford's as much of the design is
Ford Detroit, there are build and design similarities that could save you a
packet, for instance on my '88 '40 the c/l motors are straight off a UK
Granada/Sierra and the ABS sphere can be sourced from the same cars. the
price of Ford CL motors is about ?2 as opposed to lots for Jaguar.

Glad you like my email, it's to stop spammers harvesting my email in a fun
way, glad there are no ladies present who may object!

Ian