Remember the “R” designation varied over the years. For 1968 to 1970 it did designate a 428, for 71-72 it was a 351 Boss or HO. If I remember correctly in 2003, it was brought back on the Mach 1 Mustang with the shaker.
Remember the “R” designation varied over the years. For 1968 to 1970 it did designate a 428, for 71-72 it was a 351 Boss or HO. If I remember correctly in 2003, it was brought back on the Mach 1 Mustang with the shaker.