Do the engine, keep it at 237 if you want to spin it hard, look for an alloy head, see if you can gas-flow the block...
You can spend plenty of time making up nice manifolds and headers, polishing the internals etc. Best get some nice light forged pistons made when you establish what piston shape works best for flow and reduce the pin size (thicker bush in the rod, preferably a steel reducer then a regular bush of smaller size).
Keep down the reciprocating weight and look for stress raisers in the crank.
Get a spare.
If you really want a nice project, there's a pair of Chrysler Royal AP2s for sale in Victoria (Australia) for not much money. A rebuilder which I gather isn't too bad and a spares car. You could have the only one in the US if you bought them!
