Dual quads versus big hammer!!!...

after the rod size is taken into account, looks like the dual quad Ede’s are about 6 numbers leaner on the primary side.

With pinning the air bleeds, no idea if there are also other calibration changes not reflected in the jet/rod sizes.
It's about all I have to go off of and making comparisons. Edelbrock has it down to a science where things are almost infinitely adjustable. I'm very much limited to what's made for the street demon. Of course you know I learned all of this afterwards..
It boils down to the $576 I paid for both the carburetors and about $100 in tune up parts. I've seen people pay near twice that for one carburetor and three to four times that for tune up parts to make it work. And again they start run accelerate turn off great... I just seem to be missing one or two things in the tune-up to make them perfect...
And it certainly like you said wasn't a case where I intentionally bought something that I knew wouldn't work for my car and trying to make it work. These are in many ways very close to the two 600 I had on my car for years now. In my mind I thought just a newer updated version. Again the Edelbrocks have much more available parts for tuning...
In the end I feel I'm close to halfway there and getting these set correctly. But they won't get completely thrown out of the picture until they've had their day at the track..
I'll get the 74 primary Jets today according to my tracking number and get them in over the weekend.
I've got three or four more tricks up my sleeve for these carburetors that I have to exercise....