Even though this tread started quite a while ago, it still is valid for some Z's that the time has come make some changes (like I have to). I put my Z on the road after a complete rebuild in 1988, ran great, looked good, etc., but now the old "SU's" don't work like they used to. I have in the past, had an MGA with them, and like the ones on the Z, were a royal pain to sync. I have rebuilt them, swaped out to a different pair, and STILL had problems (the front one always seemed to run richer). So now I'm installing a new 390 Holley with a "Bob Sharp Racing" intake. I guess as I get older, I don't have the time nor the patience to play with these any longer. The motor is a stock 240, the only mod is an Allison electronic ignition module (also installed in '88).