AutoPower rollcage, Any body have experience w/ these? Options

[nocones]

I just picked up an AutoPower roll cage for my car from a fellow who never installed it. Just wondering if anyone here has used on of these before. It has the rear hoop w/cross bar, angled door bars, a section that runs around the top and front of the doors, and another bar tying them together across the top edge of the windshield.
It's supposed to be a bolt-in and has plates for the attachment to the chassis, but all the parts have these tubes to fit over each joint were the different parts come together. Do I need to weld these? (IMG:http://www.914world.com/bbs2/html/emoticons/welder.gif)
Maybe I'm just having a major brain fart but I don't see how else it goes together. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)
Anybody, ...Bueller...

[john rogers]

I put an Autopower cage in my race car when we decided to go vintage racing. Several reasons, one they are in San Diego, it had DOM tubing for a reasonable price and it was something I could do over a weekend myself. It came with 4 large nut plates that were welded to the side box sections, and also grade 8 bolts. They told me to make sure the car was blocked level and then install the pieces (they are undrilled as you noted) and use duct tape to hold the sections in place and mark where the nut plates go. The nuts go down so you have to drill 4 holes for each plate and then make sure it is flat on the sheetmetal. I tacked them down, then bolted in the rear hoop and drilled the holes that mount to the targa bar seat belt holes. I then drilled additional holes as I assembled the whole thing and test bolted it together. I then took it out, welded the plates in solid, POR15 coated the interior of the boxes , touched up the paint and then installed it solid. So far I have not had to use it thankfully and it has never loosened at all. Good luck