340ci vs 360ci engine

If it was me (And its Not ) the 340 is what i would do. or do what i did about ten years ago had a 340 block a boat motor on top of that. and a 360 crank cut the crank down to fit the 340 and used 360 rods and pistons . with a good set of J heads . WOW that thing would scream.. but for the money the 360 would do great. got a good stock bore 70 340 block and crank could not give it way i tried to once the guy said no . so my son is going to put it in his dakota.. do what your money will let you do. thats the bottom line here.