349cui build up

Sounds like you have some desired parts just laying around that's great.
With the parts you have including the forged crank I would be pursuing forged pistons and stronger connecting rods. These are expensive parts and use may be dictated by your budget.
With all forged internals you would have the capability of a reliable nitrous motor in the future if you so choose. Just my .02
I have a cast crank, rods and hypers in my motor. They now represent my limitations.
Darrell