I can't help you w/ this body style, but it was pretty much a bolt on swap to put barn doors on my '74.
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'69 Chevy Custom/10 SB
'74 GMC Suburban 4x4
'66 Mustang Sprint
'77 Sportster
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'69 Chev Cust/10 swb, 350/700R4, 5"/6"
'70 Chev C10 swb, 67 front, 454/700r4, 4"/5"
'73 Chev stepper, 350/3 spd
'84 Chev K20 350/4 spd
'91 GMC 1500 Suburban 4x4, 350/700R4
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