Ill tell you right now its not all that easy, it takes alot of patience and quite some time. First of all the lower tacking rail is an absolute pain to get bolted in and most likely when you bolt it all in the first time you will have some decent rinkles in the back and have to pull the rail back out and move the top material around some to restaple it. I had to do this about 2-3 times on my dads '71 olds and that tacking rail had 2 easily accessable bolts instead of the like 17 thats in my '69 bird.

But I see it as the tops only cost about $150 leaving plenty of room to mess up a few tops and still come out spending less if you dont count the time you spent on it. If you have the patience and are willing to spend some time on it id say go for it. otherwise id pay someone else who knows exactly what they are doing and would have a fast turnaround time.