You will need a special mount plate. To use a china girl engine.
Or just add a bar about 10 inches right before the front of the rear shock mount.
The suspension part of the rear end is going to cause some trouble with a standard china girl install.
The shift kit is very useable with rear suspension.
as long as the derailuer chain is a Z72 chain or whipperman chain
Amazon.com: KMC Z-72 7-8sp chain (Dark Silver/Brown): Sports & Outdoors
Just my two cents.
I would look at a four stroke with a SBP shift kit