Interesting idea taking a truggy as base for a 1:5th scale. I quickly fitted two truggy chassis plates together. Mounted half offset crimefighter truggy tires to extend width and took some measurements to compare them with popular 1:5 scale cars.
This is about the maximum length i got with 2 chassis plates: Wheelbase 700mm / 27.56 inches. Width 430mm / 16.54 inches. Obviously too long.
I then reduced wheelbase to baja 5 length: 570mm / 22.44 inches.
Compared to a baja it is still too narrow. Baja: 460/480mm opposed to 430mm. This can be corrected somewhat with wider wheel hubs. Truggy wheels (145mm) are smaller in diameter than 1:5 scale baja tires (170mm). To be able to use 1:5 scale tires would probably require custom made wheel hubs. The chassis would need a top deck to strenghten it and might need to be narrower to fit a baja body. At least one custom center cvd is required ... cutting an original one in two halves and lengthen it with a metal tube should be an option either. Shocks would have to be adapted to carry more load.
All in all i would say it can be done. Having this much space on a chassis to fit batteries is almost a dream come true. Wheight will most certainly exceed somewhat the weight of a Savage Flux which leads me to believe one might even have enough power with a Neu 1515 (around 3KW peak).