Finally finished converting my 426 to a 450. It only took about 3 hours of work. The hardest part was getting all the parts. It looks great and handles 100% better. Doesn't feel as heavy and is more maneuverable. Heres a couple pics: before: after: and heres a 1987 suzuki quadracer that i picked up at the swapmeet with the motor in a box that i almost have finished. I fired it over the other day. I am just missing a couple parts from the exhaust valve.