Since this thread is about the RPM manifold it may be a good place to pose this question.... I am going to modify an RPM manifold a bit this winter to install on my 462 . when I did the exhaust crossover modification on my car the first time I documented it all with pics for the website (of course) I received an interesting email from a fellow a few weeks ago with some information on his views on blocking off the exhaust crossover. I put his emails on a page for folks to read. If there are any mechanics or knowledgable folks out there with opinions to share.. I would love to hear what they have to say about it. I am actually considering leaving the exhaust crossover open this time around just to see if it does make a difference in the cars cold-running manners. which to be honest have always been pretty crappy. I just put up with it because once it warms up it runs soooo gooood. :-) http://www3.telus.net/68bird/engine_intake02.htm what do you think about it?
