I messed with 32/36 Webers a lot back in my SCCA and mini-stock days. From 1000cc Fiats up to 2.6 Mitsubishi's. They are great carbs. Probably a bit small for a 2.5 liter motor but for the RPM range of the Chevy 153 it's probably ideal for the street. What we need is a 32/44 I'm trying to find an early mail jeep with one of these motors Don't tell the wife LOL As for the ticking, if you are talking about lifter noise I think it's due to the lifter gallery being on the side of the block on the inline motors instead of being buried down in the middle of a V8.