The 750 Edelbrock carbs have been known to have AF problems. Tuner did a long (even for him) explanation a while back on the issue. It had to do with the size of the air bleed as well as a crimp in the emulsion tube.

I've run the 800 carbs on a number of stroker motors. They do tend to be lean and putting big jets in them sometimes doesn't help until the needle and seat are enlarged.

So I'll say the Edelbrock carbs can be made to work but sometimes you'll end up spending a full day chasing your tail when working with them.

I looked back in my notes and what it says on my 505 cross ram engine was that the 800 carbs worked fine out of the box. But when we switched over to the Indy ram the carbs needed to be jetted up significantly. So that is just due to the difference in the intake. Something was messing with the signal on the Indy ram and the carbs required a lot more jet to deliver the same amount of fuel.