On our Gulf Stream club there are several Tour Master Gulf Stream coaches with the MBE 900 series engine, and they are a very good engine. Freight liner was installing them on their chassis, but then stopped because of the hard emission laws passed. That is when even Caterpillar also stopped putting out over the road engines. But the MBE has lots of torque and in our club very few problems. And yes I agree with a call to Gaffney Freight liner will give you all the information on that chassis. All you need to give them is the last six digits of the Vin number.