Hi. I have a 1960 LR with an 2.25 engine from a Lightweight (7:1 ?). Right now, I have an India made weber carb that I dont like. I have an eye on the Zenith 228 (http://www.zenithfuelsystems.com/downdraft_228.htm), which is an universal replacement for many american cars (one barel); think of the Rochester. My question : what would be the ideal : - Throttle Bore (1.297, 1.417, 1.535, 1.653 inch) - Venturi Diameter (22 to 34 mm available) Thanks ! R.