Ive done a high top on a full size before but it had the swing out side doors. Thats why I was asking. With the slider I thought the roof might be different.

Thinking about putting a high top on my van. I was wondering if there are any structural mods I need to do to the roof before or after I have fastened it to the roof of my van
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Might just be me but I haven't had any problems.

When I changed the windows out in my 88, I used a windshield cutter. It was a lot easier to use than a knife. Also, since I did'nt have any help, I held the window in place and marked all the holes with a permanent marker. Have someone there to help. That's a good idea