I would go with a fan drive. You can mount it under the table and just drill a hole to have it blow out from under the hood. Depending how blown you want the car to look, either drill a hole and run the hose to the top, or let the smoke unit exhaust under the car and have smoke from anywhere. The fan drive will also have some pressure behind it, so the smoke will look more like the radiator let go or something, as opposed to a seuthe which will just wisp out some smoke.
A Ps1 smoke unit board can take higher voltages (and AC) because the step down is on the board. The later units get power from the command control circuitry, so you need to feed it small amounts of DC.
