The following HS4 1 1/2" SU spacer is 30mm thick !!! I have many other spacers with vacuum take-offs and H4 HS2 HS6 etc etc, some of which are not yet listed. 


Note the keywords attract certain cars but the carb is the most important aspect... Note how this is HS4, it is NOT H4 which was also used on MGA (i am no expert here but i can see the two are different... see how i put in one photo showing the difference.) H4 ones are available more cheaply and in another listing.



To look for items in my shop, it is easiest to look in the yellow box to your lower left of "categories".   Select the category of interest and all items in that category will appear.  It is much easier than keywords.  
For example "BRAKE"   or   "TRAFFICATOR whole"   or "LIGHTS"   or   "AXLES"   or   "COOLING"  etc etc