[A1971Blazer]

while I cannot give you specific details....if you have the equipment and fab skills..it shouldn't be difficult.

if you want to use the existing holes...then do plenty of measuring of them and perhaps make a template of the dimensions and hole locations.

next decide the location for the swap seats...including the desired height...and fabricate brackets that will put them in that location

you will have to bolt or weld your swap brackets to the frames that are on your swap seats....then bolt to the floor in the stock location.

Again I haven't done this exact swap but I have done many others that would be similar
good luck with it