i bought a 425 409 from zubol in 1989, it was complete without an aircleaner, PAID $1500 took the engine back to the shop,TOTAL ENGINEERING,took it apart, had an Engle cam, we went thru it ,standard bore,new Crane cam small exhaust,434 hp,with original carbs, ran in my 58 for 10 years,needed valve job in 99 so we just pulled it out and put in a 422 ci w that makes 506hp. zubol is still aroundwishing he never sold it to ivy.