I will be putting a 305/45/18 tire on the rear of my 66', the actual tire width at the widest point is 12", will this fit with a Heidt's rear 4 link clip. I am under the understanding that if I were to notch the frame rail in order to accommodate this tire, that the Heidt's rear clip will no longer fit. Any input or advice will be helpful, I don't have ready access to a welder so I was trying to go with something bolt in, but I'll do what needs to be done.