I have searched and found some info on this job, but not much on the vents inside before getting the pad off. Im stuck and dont want to break anything. So far, I have the glovebox door, glovebox, and passenger side tube shaped duct between the far pass. vent and the main vent out. My problems now are : kick plate on pass side wont come out due to the heater box in the way. I removed the plate and vac parts, but the kickplate is recessed and hits the heater box before coming out. Secondly, the ash try hits the rear plastic duct that moves around ( up and down) but doesnt come out. I am cautious because I dont want to break anything and was wondering and any 69 owners with ac small block have gone through these early steps to get the box out.