Yes the engine starts and runs on 4 cylinders 2 each side converts to 8cyl
At approx 80 percent maximum fuel
Rack Position its normal to operate
On 4 cylinders at
1/2 or 2/3 of full load.
During cold weather ether is required to start heavy exaust smoke is normal for cold engine takes a while to warm engine up because running on 4 cyl
I put new rings and bearings in about 10 years ago parts from USA can't buy any parts Australia anymore.
Over square engine low torque.