I am not familiar with the Pinto Sprint. Was it just a the paint scheme or was there other changes to make it a Sprint?
I have a friend that has a 64 Falcon Sprint and I know it has quite few changes from the factory to make it a Sprint.
I bought a new 73 Pinto wagon with a 4 spd and kept it for 9 years. It was actually a very good car. I used it for everything including camping. I don't recall having to do any major repairs other than normal maintenance. I put Bilstein shocks on it with some slightly wider, good quality radial tires. It handled pretty well in the corners.
2002 FX4 Bright Red Supercab 4.0 SOHC, manual 5-spd & Tcase, 33" BFG MTs, K&N air filter, Modified air box inlet, Gibson SS cat. back exhaust, Bama flash, Hidden Hitch round receiver, Rear helper air springs, Electric trailer brake controller, Line-X bed liner, WAAG bar with KC lights and Wildernest shell.