1969 barracuda grills

All i can assume is that the repop plastic pieces fit just as bad. Whats condition of your originals? I repaired my original broken plastics by gluing them together with MEK as a solvent adhesive. Melts the original plastic at the crack and rejoins the original plastic Do NOT use superglue. For small missing pieces i used JB weld as a body filler. Worked great.