I got everything seam sealed. It looks excessive but it's only 2 tubes thinly spread over the seams. The welding & the POR 15 closed up most seams but I want this to last a lifetime.
I covered the cowl vent area because there were a dozen pinholes & some pitted steel that was close to rusting through that the blasting revealed.
I welded new metal to attach the vent & sealed both sides. It's now all covered with POR & looks amazing considering the rot under here.
The new corner is all sealed up & painted too.
The passenger vent looks great & is ready for the heater box. I'm proud of myself on this one. Considering the Swiss cheese I started with that almost doomed this car I managed to save it with some panel bonding adhesive & the rust free vent from the 79 I scrapped.
As for the heater box this car had factory A/C & the box was in bad shape. The non-A/C box from the 79 was perfect & fits perfectly after drilling 2 new holes for 2 of the studs. All other holes line up. I had no idea it was that simple.
I flushed the core & it flows great & doesn't leak. I saved a ton of cash by salvaging the newer heater box.