Here in the UK we have recently got authority from the compe***ion regulators to run "Cl*** Z for Period Defined Vehicles (up to 1960) with Side Valve Engine Blocks". Dreaming of a Cl*** Z Special: If a person wanted to build a racing special with a flathead engine offset from the drive line, what would be the maximum angle that could be accommodated by a Ford UJ at the back of the gearbox, feeding the prop shaft in a torque tube, ***uming that the maximum revs would be 6,000rpm? Something like this: