Build the LM on the Cyclone chassis - thumbs up!
101" max 102, and the max width does not include appurtenances (RV's) sticking out. If it did all the toy haulers would be illegal with the awning on one side and the ladder on the other.
101's is one of the reasons the DRV's look so big.
From Cal Trans:
35103. (a) A recreational vehicle may exceed the maximum width if the excess width is from an appurtenance that does not exceed six inches beyond either sidewall. (b) An appurtenance is an integral part of a vehicle and includes awnings, grab handles, lighting equipment, cameras, and vents. An appurtenance may not be used as a load carrying device.
35109. Lights, mirrors, or devices which are required may extend beyond the permissible width no more than 10 inches on each side.
I have found similar verbiage in other state regs.