Jim Stone

    There is probably no single better improvement over stock than installing an overdrive transmission, but they are getting increasingly expensive and hard to find. There is a complete SIV OD kit listed for sale right now on the SAOCA site. I think the Speedo will be a little off in your SV and the unit is a non syncro, but you might want to check into it. http://www.sunbeamalpine.org/forum/show … post124417

    If you want to keep your stock engine and go with a 5-speed, there is a conversion kit available out of Australia that allows you to install a Toyota transmission. Those who have done this are very happy with the outcome. At least one person has made his own bellhousing by fusing a stock Alpine bellhousing to a Toyota one. The best place to research this is also the SAOCA site. Try Googling "toyota ("5 speed", transmission, tranny) site:sunbeamalpine.org" to get started.

    Have fun.