Followed by the heater unit;
This one also put up a bit of a fight, mainly caused by the fact that the new seals I made are slightly thicker to give a better seal. But after 15 minutes of fiddling, adjusting and repositioning the heater it was fixed to the bulkhead. Well pleased with the way the foam rubber seal around the coolant pipes fits.
With the heater mounted to the bulkhead I climbed inside the car to mount it to the transmission tunnel. Rather straightforward but with all the bolts and nuts tightened up, I found out that the flap to direct air to the foot wells of the car couldn’t be opened .... bugger !!!