Take a dial caliper, Measure the inside diameter of your shifter lever (or the outside diameter of the shaft it goes on). Compare to the one in the boneyard.
Also, count the number of splines/grooves in your existing shifter.
If the diameters and spline counts match you should be good. Provided you have room behind were the shifter mounts for the new heel part. I would just kinda eyeball it.
Course, if the boneyard just wants a couple bucks you could just take it home and try it. Although no use if the diameters and splines don't match.
Good luck, Keep us posted