I'm not a gunsmith but I did something similar. I have a model 70 that I converted from a blind magazine to a drop down floorplate. It turned out really good. I took the slow approach to removing material and it fits better than a lot of factory jobs.
A little patience, some careful use of the dremel tool, razor knife, chisels and sandpaper wrapped around a socket or straightedge for the final fitting is how I did it.
fish head
