webber 46mm carbs

[79slant]

hey guys, new user here, and new owner of a 79 911, with a 89 3.2l engine. I bought the car with a set of 46mm carbs on it, but i have decided to go fuel injection I'm looking for some info on these 46mm carbs. they are originals, stamped webber and have the insignia as well.
one is stamped 46IDAC/729 and the other appears to be stamped 46ID3C1/41
the one with the very low number of 41 is difficult to read, but in the correct light you can make it out. I'm looking for any info on these carbs. they were on a 89 3.2l engine and i have the REP stamped lowers to adapt them to the 3.2. value? what do they belong on originally? History? anything at all. i have included a few photos. car was running but rough, I'm sure they need a full go through. I'm interested in the low stamp number on one of these and if means anything at all.
Thanks

[Racerbvd]

Do you have the 3.2 injection for the car?

[andoni510]

Bringatrailer has auction results for 46mm carburetor in all types of condition. Here is a recent sale.
https://bringatrailer.com/listing/carburetors-30/

[andoni510]

….and a fully restored set done by one of the best in Weber rebuild and restoration.
https://bringatrailer.com/listing/weber-46ida3c/

[79slant]

I do not have the original fuel injection, but I have sourced most of the parts that i need, I do plan to run a standalone, just haven't decided what one yet. thanks for the links for bring a trailer listing's. all great info and it appears as though one of those listing's had a low number stamped as well.

[Racerbvd]

I have the complete injection from my extra 88 3.2, i was looking at going with PMOs,