I do believe I have the correct repo bellcrank and linkage for my '66. (3872895 z-bar) I am on my second bellcrank - one came from 4speedconversions and one came from Ground Up, and they are both the same part. The pedal to bellcrank arm came from 4speedconversions (9774625) and according to his info; this one is correct too. ( I do not have original parts like these to compare with) The linkage to the bellcrank performs spot on, and the bellcrank appears to look like the pictures I've seen online as to what an original looks like. I stayed away from the 67 parts because they were designed to go around the '67 crash absorbing steering column, and I do not have that on my '66.
When this early z-bar is on the car; the lower arm comes VERY close to the oil sending port - and here I have a "bigger than a stock sending unit" 90* elbow for a mechanical oil line. In an effort to stay away from the oil fitting; I cut the welds for the lower arm and rewelded it back on, only rotated a little farther away from the oil fitting..... which located the linkage a little lower than the factory placement. Since I ran into clutch disengagement issues; I removed this modified z-bar and replaced it with the second un-modified z-bar. So now for all this work I've been going through in order to make this clutch work; I have what I believe to be all stock factory components - albeit the z-bar and its pedal linkage are repos.
And I do have the 3/16 factory rubber bumper.
There is a guy over at Corvetteforum who has tested a bunch of off the shelf clutches on a press, and found many don’t release within this range of travel.
Thank you, Bill. I searched and found the Corvetteforum thread about testing various clutch packs for release points. Very
interesting. I did this travel test to my new Hays clutch, and it is so very close to meeting the proper .050" disengagement feeler gauge in at a .500" stroke, but it doesn't it. Too tight. I can push down on the PP to about .580" and then I get a good feeler gauge reading, but since our maximum available stroke on or linkage is reportedly at .580" - this .580" is not achievable on the PP when you factor in the proper pedal end play at the pedal in order to not have the TOB riding the PP.
The next thing I'm going to do is remove my tranny so I can get an accurate distance measurement at
the TOB end of the clutch fork. I'm going to measure clutch pedal up and clutch pedal down to see if I am actually getting .580" travel at the TOB or not.