Turnouts on our new layout

[rthornton]

We are building a new layout and was wondering which number# turnouts should we use on our mainline and switching yard? We will most likely be going with Atlas or Walthers Code 83 and running a double mainline 18" & 22" radius. Our layout will be based in the late 60's-early 70's era and will be running mostly 40'-50' box cars and grain hoppers with GP's and Dash's for power. Thanks for the help.