Look soldering up a non-sensored BL, such as those 9918/Feigao combos, is very easy. And you just have found the right place for any kind of information concerning BL and Maxx.
Just hook the 3 motor wires of the ESC to the motor, and the batt wires are installed in a way to get all your cells in series.
Feel free to bring up any questions here.
As for best motor...well, this is a BIG question. It depends on how many money you want to spend! But those motors you mentioned (feigao/lehner basicXL) are a very good quality for a reasonable price. Both brands are very popular.
For 16 cells, I would suggest a 7XL or a 10L perhaps. If your Maxx is on the heavy side, I would advise against the smaller BasicXLs. Just my opinion.
7XL! based on the good experienc of several forum users and myself!
Welcome to this forum!
The best is to use a set of plugs to connect the motor to the esc. soldering them on to eachother is not the way i like the best. only a small surface of the copper is close to eachother, and the resistance of tin is relative high.
If you are used to the hvmaxx, you will be IMPRESSED with the power the 7XL can toss out.. :D
Welcome to the forums, E-maxx kid. For the receiver pack, you got it-just remove the black jumper from the controller and plug the rx pack into the receiver.
As for the ideal motor, well, there will always be opinions that vary here. The Lehner basic xl motors are good for a light truck, the 10L is great for most trucks and the 7xl is also an excellent choice. I think the 10L and 7xl would be the better choices, in combination with the heatsink/clamp.