I think you need different mounts.
Maybe the 60/66 Guru's can help with the correct mount.
Here is the flip for ya/ on the pictures.
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The early bird gets the worm,
But the second mouse gets the cheese
84 Chevy K-20
63 Impala (my high school car)
http://67-72chevytrucks.com/vboard/s...Crew Cab Build