Join Date: Mar 2002
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Re: CJ7 258ci installing a offenhauser intakemana
I have a Clifford manifold with the 390 on a 258 short block with a mild cam, 4.0 head, Borla headers, and a host of ignition mods including an MSD. Haven't seen an Offy up close, but the pictures I've seen make it look fairly different in design than the Clifford... most significantly it looks like the internal plumbing of the runners starts pretty close underneath the carb with a smaller open plenum. IF this is the case, it would make the Offy a stronger manifold for lower-end torque and weaker (by comparison) for mid-range and top-end power.
IN THEORY, a properly tuned four barrel will perform better than a one or two barrel of the same size (CFM) no matter what RPM/throttle opening you are talking about. In practice, you will find an awful lot of people on this board that will trash talk the Holley. You have to know what you are doing to get a Holley tuned properly, but having the power that I do and still being able to get 19mpg on 31" tires sits pretty well with me. [img]images/graemlins/cool.gif[/img]