Horsepower limit for out of the box Edelbrock RPM heads

I cannot speak to the Edelbrock springs; good or bad, in my streeter.
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My first cam was the mighty 292/108 Mopar cam. I ran that with Mopar roller-tipped only,adjustable, 1.6 aluminum arms; and some Mopar HD lifters, preloaded to 1/4 turn, which turned out to be not quite enough. Shortly after break-in, I readjusted them to 1/2 turn, which has been maintained ever since. This cam was only in there for a few months, cuz I knew right away it was wrong for my combo. I sold it to a racer, lifters and all.It sure looked good on paper tho, and was a ripper after 5000.

Next came a Hughes HE2430AL, and Hughes also supplied the HDlifters,and new springs.This was my favorite. This one went 106mph in the Quarter at 3650 pounds, with 3.55s, trapping in third gear.This 2430 was a great street cam, and with overdrive made phenomenal fuel-mileage, which is partly why it was such a great street cam.This combo ran close to 200psi cylinder pressure.

Next came a Hughes HE3037AL, and Hughes again supplied the HDlifters,and new bigger springs. This one traded quite a bit of bottom end away, for a lil more up top,a good trade I thought. This is the cam that went 93.But eventually, I really missed the 2430-bottom end and so,installed a Commando box with it's 3.09low gear, a 16% boost. This last cam has been in there since spring of 2004, and has maybe 80,000 miles on it. The rest of the engine has about 100,000 on it or probably a lil more.

All these FTH combos went to 7200 with no complaints.
None of these saw a dyno.
With these, I have never heard or felt valve float, and there was never any evidence of it during freshening, which I did every winter, 6 years in a row, 2005 being the last time. All were run with 3.55s. Some other ratios were played with, but always back to 3.55s.
IMO,for a streeter, the entire combo is perhaps more important than the absolute power number. That lil 2430combo, if you math it out, was less than 350hp, and remains my favorite. It was a great ripper with 3.55s. And it was happy with 87E10; as were all of them.

More info than you probably wanted,and a lil off-topic, but possibly of some value to other readers.