71 Dart Big Block Conversion -heater blower motor

I have a problem. Instsalling a 383 into my 71 Dart, but I opted for Aluminum heads and tall valve covers...

Passenger side valve cover is hitting the heater blower motor...

Someone I met told me to log on here and that there would be somebody out here who could tell me about a conversion where in the heater blower motor could be moved/modified

thanx ahead of time

FlashBrasbo