OK heres the problem. I bought this car out of storage and wrecked. A lot of parts missing. Most of the AC was missing. Several years later it is finished with extensive front end rebuild. Been driving it for a few years and burning up. The AC is cold but I have very little airflow from the dash AC vents. I seem to get good flow from the floor vents in heater mode. The blower motor seems to be good. Does anyone know if this is just the nature of the 77 model due to the design of the ductwork or am I overlooking something. I can't locate a 77 model in my area so I could compare. Been fighting this for a long time and it prevents me from driving this beast during warm weather. Been over and under several times double checking and can't locate any mechanical problems. I tend to believe this is just poor design of the ducting. Someone with 77 experience could probably answer my question. Again, I get cold air from the vents, but low air volumn. Cold doesn't help much if it doesn't move. Need input. Anyone know if a high performance fan motor is available if that might help. Color me hot in Oklahoma.