BB Mopar head design ??

Good read. Though it doesn't address what the engineers were trying to do under the constraints they were given. Clearly adding a larger valve to a head improved performance. As stated in the article, flow suffers in most cases above 400/450 minus a named head that did well a bit further up in the lift range.

When these heads are flow tested, getting above a low 200 was great in there as cast form. After head porters investigated the heads of all years, even the smog heads showed promise. But that is after the fact and not what had to be self with at the factory front.

Basic instuctions to the engineers were something like, "Find us more performance in what we all ready have without major changes." That would mean no new casting for the sake of performance. And even when they did change a casting, it was not to radical at all. In fact, I'd call it a minor change.

The bottom line is money. Don't spend it on Chryslers dime.

Consider the year of the first big block. 1957. What was performance then is not performance now. Performance now is race stuff then. The power these engines made back the. We're out of site! Just 15 years earlier, the performance engine (if you can call it that back then) was less than half the power.

Crapping on the engineers work then is a ridiculous thing to do.