I've ran the hyper 21 in my Mgt before ,it was plenty power enough along
with the 2 spd, ,but I wouldnt hesitate using the 28 either ,but you are
also talking about a Traxxas!..:thumbs-down:
If you go big block ,then dont half ass it ,go with a better engine than a 3.3!..:cool:
This is what I would use along with a B-block chassy!..:thumbs-up:
https://www.ebay.com/itm/293633088077?epid=19011377352&hash=item445de55a4d:g:pEwAAOSwzclexi41