I would entertain the HotRods stroker kit. The kits will cost less than stock parts any you will have a much stronger motor.
If you don't want the stroker kit, you can go with a stock replacement HotRods crank, ends up costing about the same as paying someone to put a new rod on your old crank.
Woodward specialties can get you the kit, he's a sponsor, should be a banner at the top of the screen.
01' Raptor 720, Stage 2, FCR'd
97' 250 Vitos Blaster
06' Rhino 450
94' Banshee T-5's, Vforce, ported, Cool Head, 2-1
06' Wolverine 450 - Stock!
06' LTZ 440
94' Vmax4 750, 96' 600 MountainMax, 07' Nytro(b00sTed)
06' Vmax 1200