Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Strictly speaking, NO. If you still have the broken of art it can be welded back by a VERY competent alloy welder. The crankcase halves are line bored as one unit for the main bearings, the only way it could be done is by getting another crankcase half and getting it line bored again, but that is seriously expensive, and would involve having main bearing shells made specially to meet the new dimensions, and you are talking telephone numbers for prices