318 poly wide block

What kind of power do those Poly 318's make? Are they like the Ford 351-400M's big CI numbers, but small power output?
Well mine has anew exhaust leak so I'm not getting proper power from it but it sure doesn't like to go fast especially up hills but this is also a 26 ft long bus with cabinets and furniture in it so I'm sure in a smaller vehicle it would have a lot of power especially if everything was in working order.