I have a 1985 p30 with 19.5 tires, and I want to change it over to 16" tires. I need to know if a rear end and front suspension from a 1995 p30 would fit under my 1985. will the "A" frames fit and the leaf springs be the same length. I need to lower my 1985 to make a food truck so if there is a different way to lower it, I would be interested in that idea also.