Heater box is done. The halves didn’t want to line up very well. Almost like it’s 50 year old fiberglass. I sand blasted everything. Even the fiberglass, albeit very lightly. Epoxy primered everything. Then black satin rattle can. Used a DMT kit to rebuild it. Used left over rope caulk to try to fill gaps in the poorly fitting halves. Checked the motor and it spins. Replaced the core just in case.