front urethane bushing question

For any of you who have put urethane bushings in the front on the sway bar, I have a question. The OEM bushings have a "hump" on the lower side that fits into a low spot/trough in the frame member. The Energy Suspension bushings are flat on the bottom and do not have this hump obviouisly. Does anyone think this is a problem at all? I'm thinking most of the forces exerted on this mount is in the up direction away from the frame, so it may not matter...hmmmm. I may trim the hump off the old pieces and squeeze em back under there!