Bill, dont knock your own ability, I believe you are on the right track. I welded the badly bell-mouthed holes in the flywheels which came out of this engine & left the mains spindles in place. I tried to match the outside diameters together & bore through both at once, pretty difficult. Be prepared for shrinkage to distort the OD's. I turned the OD's after welding then bored the BE holes in the mill with a boring head. Disaster!! One was fine, the other bored a thou over size & knowing that I would need to turn the OD's down more after the next welding, I gave up & bought the TP crank.
When I make the replacements I will rough them out, tack weld the wheels together,then bore & hone the mains spindle bores, then same the BE's. Then split them, fit the mains spindles & finish the OD's & faces with the spindles between centres as I believe The Factory did.
When I make the replacements I will rough them out, tack weld the wheels together,then bore & hone the mains spindle bores, then same the BE's. Then split them, fit the mains spindles & finish the OD's & faces with the spindles between centres as I believe The Factory did.