This comes along every six months or so,...somebody wanting to install a Cleveland for whatever reason.
A Cleveland was the sht back when the Windsor had chicken peen exhaust ports. That was true if you had a drag car. But if going in a street car, a Cleveland was a poor choice. Matter of fact, it's documented all over the place, a stock 4 bbl head was a terrible port on a street car because it was TOO big..Couple that to the weird port floor bump, and manufacturers started making "port plates" to decrease the overall port size, and try to raise the port floor to compensate for the weird bump. Port velocity is poor, which equates to sluggish performance under 3000 rpm. Sluggish performance under 3000 rpm equates to suck ass gas mileage.
Put one on the street,...you'll get Christmas cards from OPEC thanking you for being such a good gas guzzling customer.
Add to that that clevelands have oil distribution issues, and back in the late 70's, the running gag ( if you had to guess what engine was under the hood of a particular Mustang) was if the thing was clattering..it was a Cleveland.About 60k miles and the things are noisy as hell. A Cleveland has to have its oil passages restricted to the top have of the engine, or the bottom half got starved.
Lastly, they are outright huge. Nowadays, the primary goal is to make power w/o having to lug around two hundred extra pounds...ever have to lift a cast iron Cleveland head over the fender? You'd remember if you did.
If you are having to buy heads for the thing, then yes,..you'll be able to skirt all if the factory design flaws, but..if you're having to buy everything...I just gotta ask.......
Why build a Cleveland?