I think it was pretty much all of the early Trophy Series Ford kits. Like the '32, '36, '40, and the '34 pickup and probably the '25 T and some others. I'll have to go thru some of the kits that I have and compare. I'm thinking the way it worked is that if the stock engine was the basic Ford four or flathead V8 they all had the same engine mount points so their "modern" OHV replacement engines also fit those same mounting points.