i've built several strokers using their kits, and they're all still out there. the parts all checked better than my kit, which was from mancini (eagle crank and rods, diamond pistons). of course, the rods need to be pin fitted. i don't think the chinese will EVER get the hang of proper pin fit (most likely the reason for the pin bushing failure pictured earlier in this tread). there are some things i would not use from 440 source, but the rotating assemblies have been good for me.