Hurst competition plus 4speed m21 close ratio. My reverse doesn't engage, I have to pull really hard in neutral to the left and wiggle it till it catches, as I reverse the car I can hear the gears grinding a little. I checked the shifter without the linkages attached, and a the 4speed pattern seem to go really smooth untill I hooked the linkage rods up. I took it for a test drive and every time I shifted to 3rd my gears grinded and wouldnt engage eaither but the rest are fine. So it's my reverse and 3rd, any suggestions? Thanks Nick

Read: 4sp Muncie shifting problem
in the gen tech section. It tells how to adjust your shifter. Also while your'e under there check for loose parts.