i love building sleepers, so far i have built
Mk2 cav CDi, totally stock looking with the exception of 15'' cav expression wheels and a slightly bigger bore tailpipe.
It started life as a 2.0 auto, the first conversion was a 2.0XE with lots of tuning goodies and throttle bodies (about 185bhp) used to decimate most normally asparated 2.0's
the last one we built was a Mk2 cav Cabrio, this started as a 1.8 and ended up with a 2.5V6 in it with the G spec cams, lightened flywheel and lots of other little tricks, that was pushing 202bhp, the only concession with this one was resprayed cadburys purple and had 15's on it,
the most fun we had was a friend who managed to get hold of a early 1.6 sierra 3 door, totally original and with about 40k miles on it, in the back of his lock up he had a smashed up a RS500, you can guess the outcome.....

a biege 1.6 looking 3 door with RS500 running gear, he was still running steels with the wheel trims