The whole Roadmaster chassis with Monaco kinda messed up what we (you and I) have for chassis. I'm not sure if your data plate says Roadmaster or not, but if it does, it will also say Make: Magnum which is the left over SMC magnum chassis that Monaco used up in 2003 and later. Totally different chassis, and after the fact I'm glad it's not the Roadmaster. There is a Chassis write up in Coasch Assist part one and part two that is helpful if you want to go deeper.