If it were mine, I would go with the 4" crank, you get a lot more TQ at a very low rpm (great for tall gearing), quicker acceleration due to much lighter I beam rod, plus the crank and rods are BRAND NEW! Not to mention the piston gets a bunch lighter too so now you have a very quick revving engine that accelerates the car much better...just don't see a down side other than the extra cost which is minimal in my eyes.
As for the flywheel, I'll gladly exchange the 360 flywheel for a 318 flywheel!
