I for one don't recommend the common tube shock conversions for a couple of reasons. First is that most of them retain the original lever action shocks because of the necessary suspension link and the result is a shock rate based on the combined effects of the tube unit and the remaining lever action. The second is that as far as I know there was never a tube shock designed for these Morris cars. You wind up using a shock actually designed for another vehicle so the adjustment is usually set at almost the lowest setting to get a good ride quality. I highly recommend just having the original shocks rebuilt by Peter Caldwell at World Wide Auto Parts. He can rebuild them to actually be better than new with improved bearing surfaces internally as well as an improved sealing method. He guarantees them for life, and all for a very reasonable price. Peter can also install a stiffer valve assemlby if you want a bit firmer handling. http://www.nosimport.com/
'73 Midget (V6)
'59 MGA (I6) under construction
'73 Lotus Europa
"There is a fine line between a hobby and mental illness"