Newbie here...can't get clutch to disengage...
"But, because everything is brand new and specific to the A-body, it should be working and it's not. That's what is driving me crazy."
Every part that I bought for my A-body construction that was SPECIFIC to the A-body had to be massaged in one way or another....I am looking at a POLY LOCK transmission mount, sitting on my desk that I paid $70.00 for that's a bolt in (supposed).....to what car I have no idea....supposed to be for mine. I ended up making my own trans mount out of bar stock and flat steel...SOLID.
I agree with the other issue.....could be the clutch itself not installed properly.....if not modify the z bar....you won''t be the first person to have to do this to a new part....trust me.