What do you mean "will the stock starter work?" If you mean will it fit, yes it will fit.
Will your radiator work, yes if you run a stock 305. I would really suggest an aftermarket alluminum radiator like a Griffin. My car has never even come close to overheating with the 26"x19" Griffin, CSI electric water pump and the 1 speed Taurus electric fan. Most guys use the 2 speed Taurus fan though.
Exhaust manifolds........either you can make a drivers side header and use a standard block hugger on the passenger side or you can use a mid 70's Camaro sytle manifold on the driver side and a ram horn manifold on the passenger side.
Guy