cougar 4

[gerbil]

hi
i was playing around with my schumacher cougar and had a brain wave, so ive managed to fit most of a rear end of a b4onto it but come across a problem wiht the b4 gear box fitted the cvd's are 15mm sort ive measured the width of the gear box out drive included and its 50mm and i was wondering if any one knows if there is a gear box from a 2wd which is around 65mm wide (i was thinking maybe an older model such as a losi xx or a b3/b2 or any others any help woould be greatly appriciated
cheers