SBM Edelbrock/Speedmaster Head Data

On the matter of porting for all out power!

I guess most folks have seen the Dulcich Edelbrock mods and the 90hp he found!
That was going to be my plan also, but finding offset rockers is getting difficult indeed.

So what can be achieved without the Dulcich 'pushrod-pinch' mods?
500hp would be a great step forwards for a street driven 360ci.

But looking at the 305 T/A heads that were done in 1971, is 360ci too big?
Is going 408ci or 426ci a waste of time with the heads available at present...:BangHead: