Standard he has no hope, they have sealing issues that prevent them from making decent power, at least with a standard headgasket anyway. In short he is full of shit, though they are an iron block which makes them quite robust and they don't have rocker arms like a SR (this can be fixed easily) plus they are dirt cheap. Like any engine they have short comings, but they can be worked around their downfalls. I know of a handful of CA's in australia that make in excess of 300rwkw. Like anything budget is the issue.
xRHETTx, yes you can
Smiley, capacity will always win in the end