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FS2004 Boeing 747 Classic

Probably not although most airlines did go from the -3/-3A to the -7/7A for some improved performance. I'm recalling most -100's did have those fairly soon when PW made it available. To quote an engineer/pilot/management (not sure) "We had a celebration when the last -3 model engine was replaced by the so much better -7A models." 😁

However, it WOULD be fun to have the -100 with those -3A's that are struggling to perform well. I recall reading from a controller that out of LHR, 747-100's with the -3A's would still be below 10,000 ft by Manchester. 😲 Thats 130+ nm away. Slow climb!
I think that would be really difficult to do; both the panel and the flight deck would need to be created, as they are different on the early -100.(autopilot and other)
It would also require modifications to the fuselage behind the upper deck to account for the hump where the systems are housed.
 
Difficult decision to spend many many hours on modeling something so few airlines used. Quite the rare mod!

Interesting even with the JT9D-7R4G2 motors and how many airlines used it :
The following 747-200 (-B and -F) are delivered with PW JT-9D-7R4G2 engines, however several earlier built PW powered 747-200 aircraft were later re-engined with spare engines or engines from early retired 747-300 aircraft :

Air China : L/N 591, 628, 670, 814
China Airlines : 752, 462 (re-engined),
Korean : 718, 720
JAL : 579, 581, 635, 754, 684
Singapore : 710
NWA : 594, 595, 642, 644, 651 (many engines changes at NWA , most freighters -7Q, all late built 251B to -7R)
United : 673, 675
SAA : 154, 158, 160, 194, 198, 301 (all re-engined)

Commercial Jet Aircraft Census by Bill Harms, update September 1998.
Yes, its a waste of time to make these sub-variants.
As far as I know, the 7Q and 70A are very similar internally (maybe identical?).
The best thing about it was the long cowl, which made it look better than the standard JT9.
 
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