More details of modified parts for the conversion.

The driveshaft was built by combining the rear of an MGA 1500 driveshaft (which is longer than an MGB shaft and doesn't have a slip joint) with the front of a Ford Explorer (!) shaft. Ford Explorers and Miatas use the same splines at the gearbox.

A 1977-80 style MGB radiator was slightly modified. The upper water neck elbow was replaced with a straight piece, and a filler was added to the top tank.

The factory gearbox crossmember was modified to fit the Miata 5 speed gearbox.