The chain is the same length. Not sure which front sprocket your engine will come with. You may have to go to a slightly different chain depending on your front sprocket size. The biggest problem is often the carb hits the frame. You probably won't have much clearance from the front of the engine to the back of the front tire. You might be able to get away with it if you don't run a front fender. If you want to run a front fender, you will more than likely have to lengthen your frame. The best place for the bettery is on top of the rear skid plate in side the frame, you will have to build a battery mount if you want electric start. You will have to fab up a wiring harness or buy the parts from DR. ATV for the wiring harness for it to be a plug and play type of deal. You will probably have to buy a differnt intake for the carb to clear the stock frame.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90