You will need to have your driveshaft cut down, the 700 is longer than the glide. No major clearance problems with mine.
The trans mount is also farther back, I fabbed a new crosmember using the ends of the original one and some square tubing.
Make sure you get the proper brackets for the TV cable. The TV cable regulates the tranny line pressure, improper brackets will burn up the unit.
If you are using the stock lock-up converter make sure it is going into lock-up. Running the stock converter without the lock-up for an extended period of time will damage the converter, which will also damage the trans. I have an Art Carr 2200rpm lock-up stall in mine.
I used the stock powerglide shifter in my 67. I used the shiftworks conversion kit.
You'll love the overdrive. Good luck,
67 RS/SS 350 700R4
69 SS clone unfinished
72 454 Weekend Racer