Got a sample so I could figure out how the dado needed to be. I tried a few different attachment methods. The last one with a 35 degree back cut seems to be the best I think.
1949 Chevrolet 3/4 Ton - Still Solid. Regular Driver OT Vehicles: 1950 Chevrolet Styline (Parts) 1952 Canuck Pontiac Sedan Delivery (Well Underway) 1973 F250 4x4 Highboy 1977 F250 4x4 Lowboy
I set everything out with the 6" boards and strips. I am not sure if I like the skinny spacing vs the OE 8" boards? Lowes might have wider boards available. Not sure on the cost?
Special order from Lowes is crazy expensive. Sometimes they have wider boards in stock which are reasonable. Need to go take a look and buy some to compare what it looks like.