I've shot off an email to my friend with regards to the weight and I'll let you all know when I know.
Ford Australia was forced to dump the 302W in favour of the modular on the grounds of emissions requirements, so the replacement choices were the single-cam or the quad-cam modular. Given those two choices, the quad-cam would always come up on top. As I understand it, quad-cam does not mean rev advantage, it means flow advantage, which usually allows itself to be used with high revs. But if the high revs can’t be met for other reasons, that does not mean that the flow advantage can’t be used in other ways. In this case the advantage was lots of (environmentaly) clean horsepower, something they could never achieve with the 302W. Fundamentally, the 302W was a very dirty engine and that is why it suffered in the horsepower stakes in modern production cars.