After market parts "RESEMBLE" the original. Very rarely do they fit. Start with the hood to cowl. That gap has to be right. Then you can look at the fenders, and nose. They probably will be to narrow or to wide, the wrong shape, lacking hole that hit any thing, and are not straight.
The only thing that is good about the stuff is-- it is not rusty " yet"
Dave's Hot Rod Shop KC Mo.