Thank you for the responses.
I am pretty set on getting the 8.5T motor as a friend who has the same car has the same turn with a Tekin setup. I am still considering the Tekin RS but the Canadian dollar is so low right now which makes it cost more than I would like. What pinion size is best for that turn of motor?
I went with the square pack for runtime and it will make in more planted. I'm not really concerned about position the weight differently. The runtime on a 5800mah would be amazing in these little cars.
I'm thinking the blockades for the rear would be best suited for the track I run on. For the front tires, which rib tires are better suited to loose dirt?