I am still waiting to get my crank checked out so I know what size bearings I will need. But I just called Summit anyways and they said their Web page is incorrect, the bearings are fully grooved, then I asked if there are any 1/2 grooved mains and when the Tech guy came back he said all the manufactures show fully grooved mains only. After I a hung up, I forgot to ask about the 3/4 Grooved mains, but you would think if they were available he would of found them ? Unless his search was specific for 1/2 grooved mains only and wouldn't show anything else ?
I'll just epoxy up the grooves in the bearings and run them...
I will start looking at the Cleveland bearings, just will have to grind off the tangs, since I won't bother to have the block and caps slotted. The tangs are for locating the bearings for ease of assembly, it's the bearing crush that keeps the bearings in place.