they make a smaller weber 28-32 thats more applicable

I run a 36/36 dcd 7 on a A14 engine Dead STD except for an Electronic Ignition. No problems, no idle'ing isseus . I would recommend get the right jetting for the A12.

so what would be the best option in terms or performance and functionability a 28/32 or a 32/36 with the right jetting

I think Any Carb would work Depending on how mutch effort you put in getting it sorted. I prefer the weber, because of its sound and the way it goes if you open both choke's . More air is what you want. 32/36. is what i say.

Where do I source a 28/32 from? 2nd hand of course.

also is it better to get a brand new 32/36 with the full kit or should i get a good 2nd hand and source the rest from redline. also how much work and what sort of work would be needed to get the weber to run smoothly on an a12 with extractors

cheers
joey

I second buying a new one in a kit.
I had the joy of buying 2 on ebay ( 1 as is {paid way too much} the other "remanufactured" {sort of}) I had to fabricate the throttle cable, the carb adaptor plate listed in the application guide didn't fit the manifold, after several times or trying to find the right part #, I ended up making my own adaptor plate. The comes jetting. I recommend paying the carb shop to set it up (if your car isn't illegal) since tuning and buying jets is way more $ than they want. You might want to get an EGT gauge or a wide band o2 sensor to help with dialing it in.

but on the up side...
you'll know so much more about your car.

I learned enough to stop burning gasoline.