340 vs 360

I am just saying you could build a 360 for less money than stroking a 340 to 372. The Mallory needed to do an internal balance is very very expensive and would likely double the cost of the balancing. Plus you can get a complete rebuildable 360 for $150. Unless you lucked out you will not find a 340 block that cheap.

All said an done you would have an engine that cost considerable more and would not provide any benefit.