1991 4 Gauge 5

1991 4 Gauge 6

1991 4 Gauge 4

1991 4 Gauge 3

1991 4 Gauge 1

1991 4 Gauge 2

 

There's no point reinventing the wheel for a one off thing. Just get a Glowshift pillar trim, they come in 3 and 4 pod versions for your year, you'll be time and money ahead and likely have a much better appearing end result.

https://www.glowshiftdirect.com/gray...ford-f-series/
https://www.glowshiftdirect.com/gray...ford-f-series/

See my post in this thread where I outlined for to fit a 92-97 pillar to fit a 80-86. https://www.ford-trucks.com/forums/1...r-inserts.html