Had a break in which resulted in two sets of SU HD6 carburetors being stolen off my 1958 and 1959 Mark 1 Jaguars. Does anyone know how to identify the HD6 SU Front and Rear from other SU's. AUC7081 is stamped on throttle body with a suffix of 30.
A single carb I found has AUC7081 suffix W on throttle body,. Thanks for the help

 

The usual difference is the front carb has a hole drilled on the flat between the mounting flange and the dashpot for the vacuum advance takeoff to the distributor and the rear carb doesn't have that provision.

 

Sorry to hear of your carbs being stolen ! Mark 1s generally had same carbs as the Mark 2s. I think the only difference between the carbs is that the front carb has a different float bowl than the rear carb. Front bowl =AUC2088 rear bowl = AUC2009. I would suggest you call the EXPERT, Joe Cureto at 718-762-7878. He is most helpful on the phone . Good luck !
Schmitty