Who's running a Champion 19" core radiator?

[72malibu]

I'm restoring my dad's '75 C10/C15, with a 350, auto, a/c, for him. I previously bought a Champion 19"x28" three-core alum. radiator.

Lo and behold, the fan shroud and the radiator support panel are for a '79-80 model. The fan shroud is two-piece, #14016544 and #14016543. These parts can "work," but I'd have to fill in about 1" gap between the top of the radiator and the support panel insulators. Looking for a better solution.

Is anybody running the 19" tall Champion and what support panel and fan shroud are you using? I think a bunch of people are using this same radiator.