I built a val 72 daytona with a DW case. The movement dropped right in. Finding a set of chrono hands that fit correctly ... now that was another story. You should be able to find a case in the $300 range. Then you need to source a dial, correct crystal, movement (which will most likely need to be serviced), gen crown/tube and if you would like, a better pair of pushers from Ofrei or Cousins. This a good post on the subject. Expect to spend 2 grand or more by the time all is said and done
http://www.rwg.cc/members/Aftermarket-Dayt...aytona%2Cpusher