The company has maybe about 30 units total, some are Type IIs (like the one in question here), some are the kind with a module box on a van chassis with van cab and pass-through. Most of the company's units are Fords, although lately they've been getting Chevys. They are manufactured by a few different companies. I believe McCoy-Miller is the most common manufacturer of my company's units, but until I go back to work on Thursday, I won't know for certain.
Surprisingly, this particular ambulance is actually one of the less problematic of the fleet. Although a bit rickety, it still has most of its power, most of its braking ability, the AC works fine, and the steering is tolerable (a bit lighter than I'd like, and perhaps starting to get a bit loose). Emergency and regular lights, siren, stereo, other electronics, and AC all seem to work fine (at the same time) at regular idle without seeming to cause a strain.
The biggest problems with this unit, as with a lot of other units at this company and the others I have worked for, is that it is not properly maintained on a daily basis. Cleaning isn't done regularly, so even when it's washed it still looks grungy, the interior looks grungy, interior panels are allowed to break or fall off without being fixed or replaced, there are loose screws holding stuff together, hinges squeak or are sticky, dents and scratches aren't fixed, etc. In general, its appearance sends a message to customers that the company doesn't care.