Replacing a A-frame Jack, need to enlarge 2" hole to 2-1/4"

I was thinking of using my sawzall with a diablo metal blade and cutting 8 cuts about 1/4 of a inch in and using a vicegrip to bend them out some and then tapping the jack into the hole. The top hole in the A frame is big enough, just the bottom hole is too small. The metal is less than 1/8"