cuda8 , you put a bigger Holley, that's why you like it, you should have tried the 800 Eddy, if you want to install it and forget about the, every 2 year tune ups. Many people that store their hot rods use the Eddys for reliability.
The 1411 Edelbrock 750 weighted secondary restriction is always going to react the same, a spring restricted secondary is stupid, since it will not act the same in different temperatures. The Holley springs are flighty. The Eddy has a feature that when WOT it pulls open the weighted door a bit. And it is directly opening the secondary, and letting the weighted door open on demand. Holley is only opened when vacuum rises. The Holley power valve has to be changed every two years along with the pump diaphragms, the bowl gaskets can fail and dump fuel, not so on the Eddy.
A Spring is what restricts the Holley Vacuum secondary, and it's what sucks about tuning them. The quick spring change pod is nice to work with, but you have to test the weight it takes to compress by using a kitchen scale to press on and watch for weight on the dial at 5/8" tall. The springs that work are in the, 3/4 pound to 1.5, the silver full length. The Holley rear jets need to be 82-84, unlike the plates that are #76 in the list#3310.
The #1411 needs larger needle/seats. And is why some don't like it out of the box, for racing
The enrichment is made by vacuum drawing up a tapered pin in the jet, by springs that are rated by vacuum, the stock ones are fine @ 5hgs. I found that the Eddy is more drive-able, it reminded me of 1972, driving my stock 1966 Caprice 327. The choke is very easy to adj. and the rods are heavier than Holley. Holley chokes are more restrictive at WOT. Thus the need for Proform body's. The Eddy fuel line must be changed to the chrome upgrade to work with existing Holley style pluming.
I think the Eddy fuel pump is superior, umbrella, similar to factory 2 bbl, it is instant. The Holleys have to set a steel ball or force through rubber plug on the bowl to start. And lift a weight under the squirts.
I found that the vacuum Holley will run the rpms up going around a turn when I don't want, then I have to feather back the gas. Eddy did not creep up and was very stable. For that reason I like the Holley double pumper on the street better, and for consistent ET's I like the #3310 Vac. sec. The Eddy 750 was also giving consistent ET's
The 1411 is available for $249.00 from Advance Auto Parts, a friggin deal, all others want $330+,, it's dropped sipped from Edelbrock near LA. CA. search E-bay, & Amozone. Those other brands are over $400.