Made some mistakes already

Apparently I'm wrong already. There are two rod lengths. I'll need the short type. Also I'll need the 410 crank which is weighted on the flywheel. I'm starting to re-think if it's worth it to convert this into a 410. The crank shaft weighting is what worries me. I could sure use some input or maybe suggestions on a different build. I'm just looking the most cubes for the dollar. I have a limit on my budget.