I have a 1969 ford Custom Cab w/o a tail gate. I found a tailgate on ebay off a Ford F100 will it work my tk.

Answer 1

Your choices are '67 - 72.
1/2 or 3/4T are the same type. The mid 70's tailgate will work, however the body lines are different & some modifications may be needed to the latching mechanism.
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Answer 2

You can also check on a new tailgate, try these;
www.dennis-carpenter.com
www.lmctruck.com