Well, I will respond to your question.
I would try to talk you out of the conversion. I own more guns than I need according to my wife (I still have a list of more needed). I am not a person that has guns that I do not use and hunt with (collection for value). The model 100 in 308 is one of the all time classic hunting rifles. The cal. has taken many a deer and bear. When I was a small lad my dad took his 100 in 308 to Newfoundland and shot a moose and a caribou with it! I really do not see what the advantage would be in the conversion.
Well that is my 2 cents worth any ways, it is your gun do what you want.
Here is a very handy and effective device I use to dispense corn with - but it could also be used to dispense any other seed or deer feed.
I had an old feeder that had a failed motor... I made a set of brackets to attach the feeder to the rear of the 4 wheeler - the lower one encircles the feeder and has a forward section with holes drilled in the outer ends of the bracket... these holes align with two 5/16" bolts that drilled into the rack of the 4 wheeler.
The upper bracket is an "L" shaped...