I like the SACO unit I put on my Beck, but it would require that you cut a hole in your tunnel. If you don't want to do that, there are a number of units that just require you to weld an attachment point on your clutch pedal and cut a hole for the pushrod for the master cylinder. Either way, the attachment to the master cylinder is the most difficult part, and it's not really that bad.
Check out https://www.speedsterowners.com/forum/readmsg.asp?t=20133
That thread makes it sound worse that it was. What can I say, I'm a drama queen, er, king. You know what I mean ;-)