Hi Allan.
My Legerra has disc/drum and a 2.0 pinto and I found it better without the servo.
The right bore of master cylinder is probably more important.
The servo from the Mk 1 escort that sits on the extention housing fits under a sierra bonnet but I think you will have problems with the manifold on the pinto.
The rover/mg metro used a remote one which my fit somewhere up front near the radiator if you are short of space on the bulkhead.?

September.... finger out pull your.... :)

Alan you may have to fabricate a bracket as the MK 2 cable as an adjuster at the handbrake lever end which takes out the slack. If you need photos I can mail them to you.