I have the original BCS.

Anyway, the 1970 Plymouth service manual is one source, it states: N=383HP & L=383. The broadast sheet gives the N and E63 code.

E63 being the code for 4bbl - E61 being code for 2bbl. The N is code for 335hp 'Cuda 383 engine?

The fender tag agrees w/ broadcast sheet, dash VIN, VIN # under radiator decal & cowl. The last few digits of VIN are also stamped on pad on block. Everything matches.