Of course not.
(The 4-6-2 chassis is later K-Line, not Marx; smooth, can-motored runner.)
Mike Wolf's greatest "gift" to 3RO bashers: the RK 2-8-8-2. It comes with a big tender, big boiler, is solid and "upscale-able" with 1:48 details and enlargements. I just made this one up (note PW Lionel trailing truck - pretty scale-ish itself).