I had trouble with new fenders for weeks. I eventually got mad, enlarged a bolt hole and used a pry bar. Got things close, tightened the bolts and walked away. 6 yrs later i only see a pretty good result. Let us know how the latch works out.
~ HB 1966 Chevrolet K-10 | Ghost: formerly Flappy Fenders | In the Stovebolt Gallery 1962 Chevrolet C10 1962 Suburban