[Zoomad75]

Bad news, the foam piece we need to seal the heater core pipes to the inside of the firewall isn't available. LMC don't show a listing and I even popped into the GM parts catalog from work and they don't show it in the drawing much less list it.

My only hope is that the hilljacks left it in the bottom of the heater box and never pulled it out. Otherwise I'll have to find some foam to cut to fit.