One thing really annoying was the pass door would screech whenever opened. There was no gap between it and the fender. That is now fixed. Look at this nice gap now:
Back to heater stuff. Got the parts yard spare stuff cleaned up. Heater core is brand new.
The under hood fiberglass box is the original, I just scrubbed it and painted it. Absolutely no odor and it was crack free!
Factory #4 didn't come off, even with brass scrub brush!
Fiberglass effect looks really nice actually. I'll take a break when I can get one! Now I'm waiting on the new box to firewall gaskets to come in so I can put back together. Also I am still thinking about how I want to mount screens to keep mice and leaves from entering the blower.