don retired?

[Don Dulmage <big-d@xxxxxxxxxxxx>]

Well thanks for thinking of me Earl but I am retired for good now. What is nice about the OR build is it can be built successfully by any shop willing to follow the specs. 
Re the intakes. I am a big fan of both the Holley Street Domniator (which I used on the lemans project engine 400 cu inch for the Nascar Returns to Lemans practice car) It is an exceptional manifold and was for many years my absolute favorite single four for 440s. The RPM plus is a dual plane but it doesnt know it. It works very well and is fat on power all the way up. 
A dual plane has an interesting thing we dont always appreciate. When we run a single plane we have a double gulp on the drivers side rear corner of the manifold as 5 and 7 fire in sequence (so they intake in sequence too) This is like trying to sing too long without taking a breath and at extreme performance levels can be disruptive if the demands are high enough. The cam companies make a swapped firing order cam for the chevies but despite me asking as early as 1990 none is yet made for our motors HOWEVER, when we use a dual plane 5 and 7 are no longer ingesting from the same carb barrel.  Not the be all end all but certainly something to think about. I do know that Edelbrock put a huge amount of effort into the Rpm plus intake. It shiows up on the dyno able to run right with the single planes and hardly any difference only a few percent which could even be a weather change thing if dyno was not run on the same day back to back. Air presssure and density aka God's Supercharger, can make a huge difference. If dyno charts are corrected that is less of a problem but I am from Missouri. (NOt really but ya know what I mean)Ya gotta show me!
Which manifold? Both are exceptional. Choose the one you have an a leaning towards
Don
Author of
Return to Deutschland (True Adventure)
Old Reliable (Mopar)
http://altonapublicschool.faithweb.com/

http://seniordragster.bravehost.com/index.html
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