I know this thread is old but the info in it is great.
For the valence, I don't have one from the 90 Burb I just got everything else from. Guy wrecked it anyway getting the core support out. Is it possibe to remove a valence from another Burb WITHOUT having to remove the bumper or core support? That would be great if so.
Otherwise, I may just keep my valence I have now and either fab up some brackets to support the bottom of the grille or just live with it not being supported. I know that on my 85 grille I have now, it's not supported at the bottom either and kinda flops around but it hasn't been a problem thus far. And, my valence is already painted body color now anyway.
Lastly, when swapping core supports, you didn't have to remove the rad at all? Did you just remove the shround, unbolt the rad and let it lay back aginst the fan?
Thanks! I'm getting ready to do this swap in the next month.
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