Quickest/easiest way to identify a 440 intake manifold?

Okay...what is the fastest way to identify, or more specifically, tell the difference between a 440 and 383 stock intake manifold?

Here's the deal, a friend of mine has an factory iron intake for a Chrysler big block, but he doesn't know whether its for a B or an RB engine. Are there some simple numbers cast in that identifies one from the other? I can't physically see the manifold myself as he lives too far away to drop in, so I can't tell by looking/comparing to anything.

Or a basic dimension I could give him to check? He's not the most mechanically apt guy, so the check needs to be as basic as possible and I have to be able to describe the process to him over the phone. Any ideas?

Thanks in advance, guys.
Dale

The 440 intake would be wider then the 383 or 400.

I don't know the width difference off hand though.

Thanks, Bill. But the problem is, he only has the one intake without any others to compare it to.

Dale

RB intake will be about 14" across the front of the flanges where it mates to the head, the B will be about 13".

Excellent. Thanks, John. Now hopefully he won't get a measurement like 13.5"!

Dale

Local Mopar tech genius ZIPPY just PM'd a brilliant idea. Just Google the casting number like so: Mopar Casting Number 2806301 (the number on my buddy's intake)....and viola! 1968-1969 383-4bbl intake! Thanks, Rich!

Dale