Jonny B
Junior Member
- Joined
- Apr 11, 2020
- Posts
- 21
- Reaction score
- 13
- Location
- england uk
- First Name
- jon
- Truck Year
- 1974
- Truck Model
- gmc c1500
- Engine Size
- 350
Just replaced heater core and got heater unit fitted but there is a 1/2" gap between unit and windscreen duct?Got screw fitted but also noticed the upper duct isnt square and is angled leaving a 2" gap at the back?All the screws in box and through firewall are connected but upper duct doesnt look right?
