I guess you can turn a 1:24 into a TTTT not a ho scale one though, but I here bigger scales are funner in different ways, they are more versatile on fullsize terrain(gardens back yards etc.) where as a TTTT is gonna have to use scale environments and are likely to get stuck easier, and are pretty hard to find parts for if you don't wanna ship internationally
:ö: 1/87 scale are fun too.. but they are quite challenging to make ...
about turning you 1/24 into 1/87... well, it will depend on the size of your electronics ...
if you could get the size i(in mm) of your electronics (w/ picture, the better) maybe i could help you