CB:
The Demon I am running is a Mighty Demon 750 with down leg boosters. It has mechanical secondaries, float bowl sight glasses, and streamlined air entries. This is the Barry Grant version of the classic Holley Double Pumper however the actual equivalent IMHO from Holley is the 4150 HP PRO Series 750. This carb is very much like the Mighty Demon 750 as it does not have the air horn stack.
I purchased my Demon from FBO Systems and would do so again in a heartbeat... super folks... super support... nice nice nice experience all around.
http://www.4secondsflat.com/
BTW, just what is the "primary" use that you are going to utilize the ERA for anyhow??
Cruising?
Dragging?
Road Racing?
Autocrossing?