Special factory order fall 1964, second owner since 1981, have all the factory specs. along with engine rebuild specs. a true 401 nailhead, with 11.25 domed pistons, which were replaced with stainless seats in 1981, dual Rochester 4 barrels, which have been tuned by a carb tech. The complete engine overhaul runs through a 450 trans, rather than a 350, which the 64's had, to a posi rearend. The body was completely taken to bare and returned to original. I have all of the receipts and records.