Can you?

[Willg]

put straight rear stays on a cantalever frame to give a stretched look? have any of you guys done it?

Edit: after searching the builds section, I found one:
viewtopic.php?f=21&t=58794

 

[wheelbender6]

If you have a welder, I'm sure it can be done. The guys that build the motorized board tracker replicas usually stretch the front triangle of the bike frame to make room for a big four stroke engine.