074 Heads

[nuch_ss396]

Actually Mike, I have a somewhat associated question.

We all know that these heads are all over ePay because of
their ZL-1 & L-88 heritige. However, I have read numerous
books about building hot rat motors from back in the day and
all of them pretty much trashed these heads for their round
exhaust port configurations and lack of power unless you ran
open headers and super combustion.... How accurate is this?
If true, what explains the crazy prices for '074 heads and
why aren't the '077 heads worth a boat-load more?

Nuch