I have a 11 inch conversion front disc set and would like to keep my 14 inch rims. Will this cause a problem or do i need to upgrade to 15 inch rims??

Taswashere, Whwn I changed my 64 to disk, I wanted to keep my 14" SS caps. I used a set of 14" X 6" Rally wheels from a 67, You can find some 14" rally wheels from the 70's cheap. If you go to a 15" wheel it still needs to be a disk brake wheel.

so 11 inch disc brakes will fit insiide 14in rims. I have purchase a set of Crager gt 14". I believ i will be safe. Thanks

Stock discs were 11" and those cars came with 14" wheels in many instances.

Some of the early Mag wheels would not fit over disk. The only way to know for sure is slip one on the hub and see if it clears.