I have a MSD branded starter on my 401 and it has worked great. You can clock it to multiple positions which was something I needed because of the oil lines coming out of the side of the Milodon oil pan. Don't remember the cost, but more than the $250.00 you paid. I have a friend with a 69 C/10 and he bought a off brand gear drive starter(e-bay) 10 years ago and it is working fine.
401/turbo 400 trans. Quadra-Trac BW1339 (with Low) 4" Rusty's lift with 31" Summit Mud Dawgs
Fuel Tank, Red Holley Fuel Pump, Razor Grill (profile pic out dated), Rebuilt steering box