Hello, I'm rebuilding an A12 motor to go into an Austin A40. I'm at the stage of reassembly but the workshop manual is very vague on the main bearings and which ones go where. I Pulled the motor apart 3 years ago and can't remember. Where do the bearings with collars go (2 of them)? I've tried a coupl of times but the crankshaft just locks up. thanks, Alan