OK - I gotta chime in with my Edelbrock fan-boy rhetoric. rofl
The Edelbrock Performer 351C-2V intake drops right on - no muss, no fuss. Right on top of that, the Edelbrock 1406 Performer (600 cfm w/electric choke) 4-bbl drops right on top of that, with no modification to the factory accelerator cable necessary - bolt it up and go.
One of my friends [who swears by Demon carbs] had an issue with one he'd purchased about 4 years ago - couldn't get it to quit leaking from the bowl. Tried to get the Demon folks to honor their warranty, and they kept either blowing him off, or sending his carb back without having been worked on (saying it had been repaired or couldn't find anything wrong with it). He switched to an Edelbrock - and is much happier now.
I recently rebuilt a Holley 750 4-bbl for a friend of mine (with an actual Holley rebuild kit), before I took it apart to being the process, noticed the varnish build-up on the housing immediately below the seals where the bowl adapters had leaked (granted, it had been sitting on the car for at least 15 years since the
last rebuild - hint... hint...).
Edelbrocks don't leak, since there are no gaskets below the top cover. The only issues I've ever really seen are an occasional stuck needle valve when you leave it sitting too long and try to run that bad gas (read - varnish-grade fuel) through it (which is usually overcome by tapping on the top cover or removing it to unstick the needle valve if necessary).
Just my two pennies. :whistling: