View attachment 25311 View attachment 25312 View attachment 25310 Yes and while many might think it was crazy to use a new 509 aluminum block with 63 Z-11 cast iron heads that was exactly what I wanted to do. What we learned was 755hp using the Z-11 heads and a Lamar intake, put the Z-11 intake back on the same engine made about(will get the Dyno sheets and post later) 100 HP less.
Keep in mind this is with the original top end with the new Demon carbs. As we have always known "no substitute for cubic inches" I wanted to see how far we could push the old stuff with a big better designed block, etc. We have the same valve configuration, no matter how big the valves are its close to what we could have or even did in the 60's.
The 755hp also produced 618 ft lbs of torque.
All in all we have learned that the old stuff really did work over 50 years ago and still has the capability of producing some serious HP today. One problem we had was the fear of collapsing the cylinder head because of the compression ratios and the fact that I have no idea what these heads had been through before, certainly were not bench warmers.
Anyway, I hope this has been of interest. I will post a few photos.
Yes and while many might think it was crazy to use a new 509 aluminum block with 63 Z-11 cast iron heads that was exactly what I wanted to do. What we learned was 755hp using the Z-11 heads and a Lamar intake, put the Z-11 intake back on the same engine made about(will get the Dyno sheets and post later) 100 HP less. 
I can't wait for September.