DC-6 question.. & DC-3 question..

[SamRo11]

I noticed the Database has the DC-6B and DC06AB, DC-3 & DC-3 Cargo.

im planing to operate older aircraft mainly in cargo configeration and just wondering about the following..
I have 2 DC-6B's one "longrange" with the CB17 2800's, Radar and a range of 3500nm..
then a "dayplane" with CB16's no Radar and a range of 2500nm..
witch do you model? and could the DB be split?
Second I have a Cargo DC-6 witch again seems to be 2 aircraft, now im not shore its proper designation the game lists both as a "DC-6C" but one seems to have a mixed cabin and one a full cargo configeration.. the later I suspect is C-118A the former the DC-6C both models use the CB16 2800's and have a range of 2500 miles..
I could reasearch all the figers but im wondering if im just missing something or have misread the db?

Finaly
the DC-3 is the model in the DB repusentitive of the 1830 or 1820 powered Dak's?

Sorry if this has already been covered.
Sam.