weber 40 dcoe 151 body cross reference

[s14280zx]

I am looking for a carb body for my weber 40 dcoe 151, and was wondering what other model number carb would have the same body as mine. I bought two on ebay, but after I got them, I realized they are different than mine. My 151 carb has a white cap on both sides near the mixture screws that cover a jet of some sort( air correction?). Any info would be helpful. THANKS, JEFF

[HKSZ]

The dcoe 18's are the carb Weber states suits 240z etc, your white cap ones are a later models, all carb experts say you have to have same bodies in a multi setup and close serial numbers are even better.