The compact tractor I use now is an older one and its gear drive so Im not sure there will be much of a difference with the clutch. Overall size is pretty similar but the jeep cj is a foot or so wider and 2ft longer, Im not sure a 6' plow is going to angle and cover wheel tracks? What are push plates and what are they used for?
Push plates are the steel brackets that bolt onto your Jeep under the engine. Either to the frame, crossmember, or end of the frame. Farther back you can get them the stronger it will be. transfers the weight of the plow bouncing around and the shock of banging into things with the blade. If you can find a set made for a Jeep will be easier. Then the headgear is usually welded onto the plates, the headgear has the mount for the plow down low and the light bar up high, lift cylinder in the middle. If you have an electric pump on the headgear then you won't need to mount a hydraulic one under the hood or find pulleys to go on your engine.
Some guys say you can't plow with a blade that is too short, you will get stuck backing out of turns, etc. But Jeeps are pretty narrow and a 6.5' blade is good for a small truck so 6' for a Jeep would probably work fine if you are careful backing up. Also tall skinny tires are better in snow than fat ones maybe get some winter tires for plowing will narrow your stance. Also need a few hundred lbs. in back to offset the plow helps with traction
As for battery i just use a good marine starting battery regular alternator never had a problem with the battery been plowing for years many different truck & plow setups. Get a plow truck you won't miss plowing out in the open, keep the tractor for backup or doing your woodlot out back just m.o. good luck