Hi Warren, I've got one of those.Fits single rail or T9 type gearbox to FORD 4 cyl block. I use mine mating Lotus twincam to T9 5-speed with starter on LHS to custom flywheel with 2-litre ring-gear. I just assumed it was cast by/for Masport NZ when they were active in rallying back in 70's -rgds, SFE