Recently, the SU fuel pump installed by a previous owner failed after 20 years in service on my xk12O. On inspection I noticed it was a round body AUA 4080 installed on the chassis where the square body fuel pump is to go. Reviewing the archives I recall a post by Rob Reilly, I believe, that advised that these round body 4080 pumps are suitable for xk’s but need to be mounted on the firewall at the same level as the carburetors. I replaced the existing pump with a square body pump AUA152 from SNG. Looking at my spare used pumps I found another square body pump type 4644 with a tag on the diaphragm flange that reads AUA172 not AUA152 as I would have expected. I want to rebuild this pump but would like to know if it is suitable for the 120?
Secondly, I have another NOS round body pump AUA4080 with a tag on the diaphragm flange that reads AUB182. Is this normal? What car model would this be suitable for?
Any assistance offered by the list is appreciated, as usual.