k so which engine

Maybe the determining factor is the condition of both engines- if one needs less work by a significant amount - say 500$ then I'd choose the one needing less work. Ultimately if you want a stroker some time in the future, then save the 340 for that option - you can get slightly more cubes from it than a 360 without having to give up as much boring it, 4.04 vs 4.00, 340 vs 360 respectively.