True to be confusing between manuals. My Dodge book shows G to be 383, no reference to four barrel. My Polara two Barrel is a G, and my Factory 66 Charger four Barrel I sold was also a G for the 5th digit. . However, the old Manuals would bounce back and forth between B and C body applications, lots of typo's as Moparchp
said.
It went from 318 to 383, as no reference to a 361 is in my Polara service book. But the B body Plymouth, and Charger did have the 361. It is confusing, for sure. I scrapped a 66 Belvedere 361 years ago that had the F in the dash.
Below was according to the 1966 Mopar Blue Parts Book.
1)273 2 bbl=D
2)273 4 bbl=D+ Code on fender tag designating (4 BBL HP)
3)318 2bbl =E Poly head Engine
4)361 2bbl =F Big block
5)383 2 bbl =G Big block
6)383 4 bbl = G + (Code on fender tag for four Barrel))
7)440 4bbl =J
8) 426 =H
9) Special order =K
1967 Parts Book
1967 all 273=D
1967 no more 361 engines.
1967 all 318=F(No more Poly head engines)
Sorry this deviates slightly from the post, but it will help the OP understand his VIN better.
If his fender tag has the code for four Barrel, then that is a rare and valuable find on a full size Plymouth, and being a VIP. Nice car Indeed!
