340 hood scoop question.

When used on a steel hood, no gaskets are needed, but I installed a set on a glass hood
and had some gaps at the mating surfaces. Since both the hood and the scoops were fiberglass, I'm not sure which was not quite flat or if it was just due to stacking of tolerances. My solution was to install vinyl fender welting between the 2 surfaces, this took care of the gaps and the resulting "bead" of vinyl looks pretty good. IMO