Not sure about the heater but I see a few other goodies.
Master power switch with the plate, cowl battery box brackets,
24 volt distributor cap and wires, just to spot a few
Always nice to have a hood number!
Before you take the sandblaster to the frame check the top
left frame rail between the grille hinge holes and the lifting
bracket holes. You might find some numbers.
The heater is a chopped late model OEM Ford unit. The installer has chopped of the mixer box end of the heater. Looks very much like this 1965 Mustang unit: