Sorry to dig up an earlier thread.  Tried sending a PM direct to 69RamAir but got outsmarted by the tests to ensure I'm human (go figure).

Question to 69RamAir is whether you'd be willing to share what the before/after testing looked like between the 2" dyno header runs compared to the 6114 header runs on the dyno.  If I read it correctly it looked like you may have tried both on the dyno?

I'm intrigued to see what "street headers" cost for power on a combo with this size/power.

Thanks!

Thanks for sharing Brent!

Any chance you'd be willing to share some of the lower RPM torque numbers?  Curious how a relatively small cubic inch engine with mostly stock heads did down low with all that camshaft.

Interested in your opinion on how something like that would be for street manners if it was plugged into a typical street/strip car (stick shift; 3.91 gears, 3600lbs, something like that)?

Thanks again for the great write up and sharing some of your hard-earned knowledge.

Thanks for posting.  Nearly identical numbers and in the same spots compared to the stock rebuild in our family Mach 1 from years ago.

I'd have to dig out the dyno sheets, but it was interesting to see that in our case (25 years ago) it was run with both dyno headers and CJ Mustang exhaust manifolds with very minimal losses switching back to the manifolds FWIW for those curious (I think it was under 10 hp loss).  Likely due to the relatively low peak RPM needing less airflow?

Dad always said it was a "great dump truck motor".  You had the same comment which made me laugh and prompted me to post and share!