Gas tank, trunk, engine bay, under rear seats, etc.
Important to consider:
* They don't all need to go in one spot. You can spread them around
* You don't need to use that many. These are classic cars that are likely trailered to go any distance anyhow. 80 miles of range to cruise around town is often more than enough.
Also worth considering: many of these classic cars are underpowered (especially after a few decades of wear & tear), have terrible handling, and not that much range to begin with. The EV conversion can address all of this. Apparently the art is in not overdoing it on this front and preserving the original character of the car. The best conversions are fully reversible if the owner chooses so.
