Alright there is a bus yard up the way from me and they are selling about 10 bus's. They all have big blocks i assume. A guy told me that works up there that they just put in a new 366 and trans into one of the bus's that they are going to be selling. I was looking to buy the bus and put the motor into either a 1 ton chevy, 3/4 ton chevy, or CUCV truck. Would this be an ideal swap to make or am i waisting my time. Btw i have not bought the truck nor the bus yet. Ideally i think that a CUCV with the 366 or other bigblock would be a cool towing rig. Please let me know what you think of my plan.

Dumb Question, why not use the bus?

366 is a boat anchor in my opinion, sure they will last forever, but they lack alot of power.

what other engine would be in the others that would make a good engine swap?

366 is a boat anchor in my opinion, sure they will last forever, but they lack alot of power.
Dad's 1972 Chevy C60 w/ a 366 (5psd, 2spd rear end) will hit the highway pretty well with 30k lbs. It might take a while to get up to speed, but it'll run right along.

I know this is going to sound a bit goofy, but in the realm of used school buses it is the gas engines that are generally considered the hotrods. Why? Because they often produce nearly as much torque as the diesel offerings, but are better able to rev so they make more horsepower. The trade-off is that longevity on a gasser is theoretically less and mileage certainly is lower.

Naysayers be damned. The 366 is a well proven workhorse industrial gas engine. Sure, it's going to be out performed by an ISB, ISC, or C7 (most common modern bus engines), but you can work on a 366 yourself and get parts at any parts store.

Personally, I would just convert the bus into a hauler. I guess it would depend on your area's laws regarding registration, but I can tell you that my bus is both cheap to register and to insure for the year. I would trust something with a 12k front axle and 18k rear axle as a tow rig much more than a 1 ton even if both are up to the task at hand. Allison AT545 > TH400