Dove's manufacturing problems, heads, blocks, etc. are well-chronicled over on the FE Forum. A few have some nice Dove parts and a great many do not.
The BT heads have raised exhaust ports, meaning revise your exhaust system and new headers potentially. They may produce more HP at the very high end of the RPM trange. However, there are many builders who still prefer the Edelbrocks an make them work at high RPM's too.
Now, the Bill Coon SOHC heads are VERY interesting to me, but even he's had some problems with manufacturing and may discontinue making them. They're priced at $5,000+ a pair, but those are bare heads. Maybe $7,000 for a complete massaged pair of heads plus all the other SOHC parts needed.
I have a dream.
