non-Triumph Laycock overdrives?

["Theodore R. Stevens" <stevens@erols.com>]

This is probably a pretty naive question, but here goes:  Just how generic
are overdrives?  I've seen lots of references to J-type Laycock
de-Normanville  overdrives on Volvos.  Are these similar to the o/d's on
Triumphs? Used ones appear to go for $250-$350 US.

I've been unsuccessful at finding specifics on my own.  Seems unlikely, but
is it possible the Volvo o/d could be adapted without lots of effort?

Ted Stevens             stevens@erols.com
74 TR6                  Gaithersburg, MD