Originally Posted by
Bill Kapaun
The description of the part hardly inspires confidence.
I had an early 70's Takara 10 speed with Suntour. The screw hole location didn't match the Shimano claw mount, so I had to drill a new one or else file away a lot of the claw "opening".
The bike now has the Tourney RDER, friction shifting a 9 speed cassette.
I wouldn't sweat it that much, the part is specifically for this application. I've used old claws from suntour derailleurs with shimano derailleurs and it worked fine. The Tourney derailleur is an option, but there are other options.