B or RB?

[mudguts]

Hey guys, I'm trying to learn what I can about my 67 PW. This rig has the 383 motor and I read that there is possibly 2 different 383's. A B motor and a RB motor. How do I tell the difference?
I was also told that this motor was a wedge, from what I've read, it does'nt look like a wedge motor. How can I tell if it is wedge?

[tragic59]

If it's a 383, it's a wedge. That only refers to the shape of the combustion chamber. Basically, Mopar engines break down into 4 basic categories depending on the shape and style of their combustion chamber:

-Hemi
-Wedge
-Poly
-Flathead

As for whether it's a B or RB engine, if it's original to your truck, it's a B.

All 60's and 70's 383's are B motors. In the 50's there was another Mopar motor that had 383 cubic inch displacement, that might be considered an RB motor, but I don't remember ever hearing it referred to as that.

Check these links for more info on the 383's...

http://www.allpar.com/mopar/sonoramic.html

http://www.allpar.com/mopar/383.html

I'm positive the second one applies more directly to your motor.

[mudguts]

Thanks tragic59, those are good links I was actually thinking that the wedge was the shape of the motor but it looks like I was confusing the wedge with something else.
Thanks again