Tailgate handle relocator questions.

[74Chevy74]

I ordered a sir michaels tailgate handle relocator for my 74, and as I was getting ready to cut into my tailgate the directions confused me (what else is new) they are written for 67-72 and 73-80 sop that's where the confusion factor comes in, as it reads "this kit MUST be used with a tailgate skin" and I don't know if they are talking about the 67-72 or the 73-80? has anyone installed one of these? I'm going to call Sir Michaels in the morning but I thought I'd ask you guys....