Hi
B707 with B737 classic engines (B707-700 :O)

Boeing 707 (-700 variant)

The 707-700 was a test aircraft used to study the feasibility of using CFM International CFM56 engines on a 707 airframe and possibly retrofitting existing aircraft with the engine. After testing in 1979, N707QT, the last commercial 707 airframe, was restored to 707-320C configuration and delivered to the Moroccan Air Force as a tanker aircraft via a "civilian" order. Boeing abandoned the retrofit program, since they felt it would be a threat to the 757 and 767 programs. The information gathered from testing led to the eventual retrofitting of CFM56 engines to the USAF C-135/KC-135R models, and some military versions of the 707 also used the CFM56. The Douglas DC-8 "Super 70" series with CFM56 engines was developed and extended the DC-8's life in a stricter noise regulatory environment. As a result, significantly more DC-8s remained in service into the 21st century than 707s.

Other Variants:

B707-020 (B720)
B707-020B (B720B)
B707-120
B707-120B
B707-220
B707-320
B707-320B
B707-320C
B707-420

Unrelated:

This is my new OC, her name is Naosha, she is Zerkk frenemy. She's look cute when angry :)

Have fun!