[blykins]

The Cleveland certainly gets a raw deal. I probably build more Clevelands than any other engine builder on this forum, and can attest that they are very potent powerplants...

With a 9.200" deck height, they are smaller than a Windsor, and the heads are certainly equal if not superior to the Windsor heads as far as performance goes. It's hard to really make a Windsor head flow without going to a canted valve layout. I can get about 350 cfm out of a TW-R head, but from there on up, it takes a Cleveland head (Blue Thunder, Yates, etc.) to get more.