You probably won't get many responses as most people are not fond of the 4.1 engine or carbs on Caddy's.
However yes it should be able to be done, I know many 4.5 and 4.9 guys have done it and too my knowledge they are pretty much hte same setup as the 4.1.
I guess I would just keep doing research into threads on PFF about carbed 4.9's and on, rockcrawls, site, bubba joes site and any other you can come up with. I would look for 4.9 rather than 4.1 info and just adapt it.
I chose to stay with Fuel Injection. For me, tuning Fuel Injection is easier than Carb. But that is becuase I have only ever owned 2 cars in my life with a carb. Had fuel injected cars for hte last 15 years. And I grew up with Fuel Injection.
------------------
85GT 5spd MSD Everything,4.9 With Nitrous. www.captfiero.com