As always, I know I’ll get the information I need on the Forum, so here goes: my 61 Willy’s truck has the original style (I think) box heater. The last time I drove it in the early 90’s, it was not adequate to keep the windshield defrosted. We live in the high desert of southern Oregon and it gets cold here. The picture attached is the model. Any suggestions on a good substitute for this one that would work better and not require modifications??