I could be able to find correct the 77 tiller steer model #322883 on E-bay for $40 + $18 shipping in usa. There rest will be a common parts with 1975.
In order to install it, the power head needs to be removed.
Other problem on 1977, when the flywheel turn around at a certain point, it touch the mag plate and make it to jump up/down a bit. Try to remove the flywheel and the flywheel nut is bigger than 1975 model. It looks like I need 1-1/16″ socket for it.
