I installed a Bestop Tiger Top on my 78. It seems to work fine. Lightline of Louisiana has them for pretty cheap. I think I may wish I had bought the supertop later on as it has the channel to lock the top in place instead of snaps, but at the time I didn't want to spend the extra $ to get the supertop.
If you are going to get the soft doors as well, make sure to compare the angle of the front of the door to the angle of your windshield. Yoo may also have to do some serious fiddling with the spacers holding the windshield in place to match the measurement the instructions call for.
Also, make sure you install it in a heated garage or wait until spring. The top will not stretch enough for installation below about 70 degrees. I left a space heater running in my garage all night Friday and then put it inside the vehicle Saturday morning for a few hours to get the max flex out of the fabric.
Do yourself a favor and get a pre-made lower panel for the back if your hard top included ambulance doors. After buying the scrap metal to make mine, as well as hardware, it would have been less than $15 more to have one shipped from CCOT.
Good luck and if you do get a Tiger top, contact me and I can give you some hints on getting the damn thing to fit the first time.