You're right about that; I think the head is the worst part of the engine. A lot can be done to improve the stock casting, but it's still an ancient design and prone to cracking. They sure did a lot with almost nothing back in the early '80s, though. "Lets turbocharge and inject a Pinto engine, put it in a Mustang with Lincoln suspension, and whoop on the 5.0s." :laugh:
It's really too bad that Special Vehicle Operations didn't get the resources necessary to polish up their ideas. Marketing politics also got it the way....the SVO was derated from 205hp to 200hp in '86 so it wouldn't upstage the new SEFI 5.0L GT with 205hp. It's especially a shame considering this is what SVO planned to do with the 2.3T engine for '87:
Instead, only a couple prototype heads were built, the Mustang SVO was dropped altogether, and the SVO team disbanded, at least until it reassembled as SVT a few years later. Ford had also toyed with the idea of a twin turbo 5.8L Mustang Cobra in '88.