Got the electronics sorted out... I made a foam cradle to hold my 3S packs and keep them towards the front of the chassis. Modified the radio box to hold the ESC instead as I wanted it up front for weight balance. Also I snuck in a few lead bits under the ESC tray adding about .75g...not much, but every bit helps. Just trying to get as much weight forward as I can to offset the motor being out back.
Holmes Crawlmaster is my go to motor, no exception here! I've got it paired with a 3:1 reduction and a 20t pinion for a gear ratio of 35.43:1 - not as low as I would like, but it's in the ballpark for a trail rig...the stock truck came with a 19:1 ratio, so that's a decent improvement. The motor is sitting on the chassis, I'd have to clearance a bit to go any lower, I'll wait and see how it does before modding any more. It still has the plastic center shaft though, I forgot to order the aluminum one. It's on the list! I'm waiting on a gear cover, it's the only piece missing from the chassis and then its test drive time!