I didnt know that, but it makes sense

I'm confused, what do you mean by this. That is the hp500 manifold

I am more confused; how does a huge cam compensate for an intake restriction?

Allowing more air in on the intake stroke to compensate for a restrictive intake manifold

Anyone care to elaborate more on this?

or a pair of 1000 cfm throttle bodies. No adaptation required.

I have a 500 efi bored to a 540, AFR heads and Tyler Crocketts Throttle body mod which mount the throttle body on top of the manifold. Dyno'd out at 693 HP.. Jeff Wurl

Talked with Tyler I'm looking at preventative maintenance on head gaskets,springs motor has 280ish hours on it. Not looking to touch the bottom end. Like to keep the appearance of stock as well. He's putting me together something. Looking at around 600-625hp

I have 502 with a stock bottom end,except for the balancing and gapless rings,Edelbrock large ovals flowed 340@600,42lb ford greentop injecters and Arizona Speeds Ramjet intake with their 1050cfm throttle body and billet fuel rails.The engine made 598@5200 and 670tq at 3700 with a stock merc. fuel pump.The intake was just port matched.Tuned the computer in the boat with MEFI BURN system.Starts great,idles flawless and we were able to improve the the shift into gear.Shifts better than the stock setup.No clunk.

So your saying a stock 502Mag makes more HP with a ecu reflash and a throttlebody than a HP525efi??? I'm curious to see that dyno sheet. Not doubting just curious.