Spridget 5 speed update

[Steve Obert <sobert@snet.net>]

For anyone who is considering a 5 speed conversion using a Datsun box
please be aware that the B210 transmission is compeletly different from the
210 transmission.  The model number for the 210 car is B310.  While the
B210 transmission is interesting for a couple of different reasons it uses
differnent splines on input and output and is a different length.  

I hope this information will save somebody some grief.