What jets for dual carb 42 Lincoln V-12?

[lincolnmatthews]

I mistakenly let the carbs go back to a "rebuilder" & didn't get same ones back. So don't know how it was jetted.

I have a dual Edelbrock manifold where all ports are connected I believe. The carb guy jetted both carbs with #52's, the car wouldn't get out of its own tracks. I talked to an old guy back East who rebuilds distributors, pumps etc. He said to put 57's up front & 54's on the rear carb (he swears by this). Well I had #55 jets & put them in the back, car accelerates ok & seems to be good on the road (although hasn't been above 40 mph yet).

 Just is very difficult to get a very smooth idle & is rough idling till it is completely warmed up.

Changed the tests out to 57 & can't say it's any better.

I should mention this a newly installed rebuilt engine.

Anybody running a dual carb set up (with Holley carbs), if so what jets are you running? 

Appreciate any help & suggestions. I really don't at this point want to spend more money for say Stromberg's? Thanks

One last thing one of the mixture screws is kind of sloppy in the threads could I be sucking air here? Haven't tried any WD40 yet for leaks.