Just purchased a used hurst billet-plus shifter via internet, It is for my 85 GT. When I first put it in, it grinded almost every shift to 3rd and 4th. After driving for about 20 minutes it seems to be shifting well in all but 4th. It grinds almost everytime shifting into 4th . I had no grinding with the stock shifter. Will backing off the shift stops help? Maybe I set them too tight against the shifter.

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