Hello, I converted my 1965 289 coupe to a 4 speed toploader from a C4. I used all OEM & NOS pieces to perform the swap. I bought a "newly pre-built/restored" clutch & brake pedal assembly that was pre-loaded with the correct HD spring, painted, with all new bushings. OEM Z-bar and all new bushings and felts, all greased. I have the long fork spring attached on the shock tower and fork, just as in the Ford manuals All new Ford clutch and TO bearing. Car runs and shifts great, no issues... Sometimes when I push the clutch pedal all the way to the toe panel and kind of "leave it there" (like at a stoplight) ... it doesn't come back up!-- Really scared me once while waiting at a light... My car doesn't have the "extra spring on the Z-bar" like the 66's have. What am I missing... it was an otherwise perfect swap.. very happy.. except for this. Thx DCN, Maryland.