I think I read or heard somewhere that several of the AMT kits of the early '60s had engines designed to be swapped directly between kits with no modification needed--direct drop-in. I believe the optional engines in the '40 and '49 Fords (Olds and Buick engines, were they? I forget.) fell into this program. Is this true? What if any other kits were involved in this? (Yeah, I know, I know, a real modeler can put ANY engine in ANY kit. I'm talking about kits where the engine mounts, transmiss