Hi John. Welcome to the forum! I think the first step will be to see whether the 76er will accept a common drop-away rest. I have read in the forums about several the work well with the FOBs, the NAP Apache, Trophy Ridge Revolution, the Rip Cord etc. If one of these will work on your bow, there is a chance you can use FOBs.
The next thing you need to know is what is the clearance between your cables and the arrow. The FOB's are 1" diameter and must completely clear cables to work properly. You can use a 1" diameter piece of paper with a hole in the center just big enough to push over your arrow. Place nock your arrow and place on the rest in the up position. You should be able to slide the paper past the cables with some clearance. I suspect an eighth of an inch would do. If you have enough clearance, you should be good to go.