[chuckbrandt]

Those numbers really doesn't make much sense. I wonder if 10% less than the edelbrock's would be a fair approximation? Although they probably worked hard on the exhaust side which was a sticking point for all FE motors. I noticed Shelby is using exaust port plates on his 1300HP motor to improve the flow.

Hopefully someone will turn up some numbers for the MR heads. As you can probably tell I am trying to build this motor with 60s technology as much as I can. At least the first time through it. I want to put together as realistic an experience of having an original back in the day. That's why I chased down all these NOS parts.

Thanks again for your help!

Chuck