Heat is the trick, oxy-acetylene with a small welding tip may be the answer so you can pin-point the flame at the casting, not at the shaft. Heat the cast till it's barely dull red on both sides, try to turn the shaft, if it won't move, let it cool completely and tap the shaft end.


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy