The problem with using a FWD setup is the type of car being built. I've actually had discussions with a fellow about using such a setup in a 61-63 Rambler American mainly because they are so cheap and plentiful. That is a unit body car, but it's the old style -- looks like a frame underneath but it's made of folded 18 gauge sheet metal and welded to the floor. The "rails" run from bumper to bumper. So cut the floor out in the backseat and over the axle area and drop it on a FWD cradle and suspensiotn, weld or otherwise anchor the tie rod ends to the cradle. We decided an auto trans would be easy since you just have to have a longer shift cable. A stick would be difficult due to shift cables or linkage, but a hydraulic clutch would be easy enough. I've seen a track-T done this way to, with a small engine under a covered little pickup bed in the back, radiator in front, luggage area where engine would have been with hard sides.
The other way is to put it in front. That means designing something... different. I've considered making a "morganesque" large three wheeler using a small three or four cylinder up front. Would be wider, but lust leave the engine hanging out in the open upfront with the radiator either right behind the engine or in the back. One or two wheel in back, depends on how you want to register (motorcycle or use donor car title).
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