So for the last 2 months, I’ve been researching intake manifold that could be used on a 383 with a factory airgrabber.
The one intake I found to line up with the build I’m doing is pn-P4529117, but cannot find one to be had. So I get a gentleman on the site here offing to sell his pn P4532061 @ a reasonable price. The I have a local buddy who happens to have a pn P4532060 brand new in the box.
So I try to find out mor information on these second 2 manifolds, but so far have found nothing. I’m basically after operating RPM range.

Thanks MOPARTS!!