hi all bought a set of brms second hand for my 1970 deluxe .i physically removed them from a splittie so i know they were fitted but cant get rears under my arches 2 are running 195/65/15 and 2 are 195/50/15 and neither fit both rub on the lip of the arch and thats at standard height so what size fits from what i remember the splitties arches were un modified and dont want to mod mine heeeelp