OK, I gathered from you guys (Most, anyway) that the dome carbs are a better route. I tried to rebuild the flat tops I have but couldn't get the **** float pin out (Any suggestions?). Soooo... I put the domes on... it starts right up but just starts revving high as **** then goes back down... up, down, up, down. Plus it keeps backfiring through the front carb. Anybody know whats going on?? I apologize for my inexperience but this is my first Z! Thanks a bunch!