Our new Revo IFS may be another viable option for you if you. I am unsure of the rail width or if you are planning on modifying your existing rails on the Rambler but we do offer it in a universal crossmember only that may work. Track width with standard brakes is 57.75" and is a great alternative stepping away from the traditional Mustang II crossmembers without going to something as aggressive as our Fast Track IFS. You can find more general info here,
http://roadstershop.com/suspension/r...s-crossmember/
