The Nose Of The Crank Is An Inch And A Quarter,1 1/4,from The End Of The Damper Front.the Block Is A 2 Piece Rear Seal 350 Block. It Was On A Stand When I Bought It,was Running And Just Pulled Out Of A Camaro Because Someone Overtightened A Rocker And It Ate A Cam Lobe.the Balancer And Flexplate Were External Balance.