Motors: Not a good choice at all. Also not enough Information on size and on how you wanna mount them.
You should go for at least 50mm (diameter) motors, although 63mm are probably better. More power.
Length will be an issue if you wanna mount them both on the same truck. Assuming you're gonna get regular 180mm trucks. The only dual motor setup you can fit on there (unless you're going really exotic with the motor mounts) are two motors that are 55mm long. If you wanna mount them in dual diagonal setup (one motor per truck), that's not an issue. Dual Motors on one truck means you'll have to get 6355 or 5055 motors. With the first two digits indicating the diameter and the last two digits indicating the length.
Next issue: 800KV is waaaaaayy too high. You wanna go for a motor in the 150-300KV range. Ideally closer to the 200KV mark. Lower KV means more torque which is what you'll need considering the weight you're moving on a board like that. Gearing also plays an important factor, but I suggest you do some more research on that by yourself. Basically a nice and simple way to tweak acceleration and top speed stats of your board.
Main point being: Lower KV, ideally more Watts/Power. Think about whether you wanna go dual diagonal or dual rear with your motor setup.
Now you can find good motors on Hobbyking (Hobbyking > Electric Motors > Outrunners by size > Above 50mm) if you look for Turnigy SK-series ones with a low enough KV rating. In my experience however there's some drawbacks to those. Namely that they are designed for model airplanes and that they have relatively large cooling holes in their case. That's bad if you ride at high speeds with the motor being very close to the ground, because it's gonna pick up a lot of tiny debris and at some point the motor will get damaged on the inside. I've had that happen to a Turnigy SK3 6374 motor and a Turnigy G160 before I solved that issue by 3D printing a protective case.
So as far as motors go - my recommendation would actually be to go with motors from either diyelectricskateboard or alienpowersystems. I'd steer away from enertion, not because of part quality but because of very shitty business practices and horrible customer service.
Alternatively, look around on aliexpress and find motors with small holes that don't pick up too much debris.
Next up: your ESC's are airplane ESCs. Don't recommend getting those. Bought two of these on my first build too and I hated it.
They just work differently than car ESCs. A car ESC will let you slowly accelerate whereas the plane esc just starts at some point and goes straight to high speeds. Which means that you'll always have that mini-heart attack feeling when you accelerate simply because there's no way to start smoothly. Also braking doesn't work the way you'd want it to. With most airplane ESCs, once you let go of the throttle it will either coast and you won't be able to brake, or it will brake and you won't be able to coast.
Long story short - you need a car ESC. Some people also made it work with boat ESCs, but car ESC is definitely the way to go here.
Drawback: Most car ESCs only go up to 4s Lipo, which won't be enough for your board. However, there's some that actually go higher. I'd look into Hobbyking's X car beast series
, particularly the 150A model. I have one of these mounted on one of my boards as well and it's doing a good job actually. Bonus points with the X-Car Beast series ESC - it has an on/off switch which saves you money on either a spark plug or an expensive high amp on/off switch. Drawback 1: The fan is relatively loud since it's so small, Drawback 2: It's hard to mount this thing under your board, since it doesn't have any screw holes.
Important note: If you go with an X-Car beast you absolutely have to get a programming card with that. because without it, there's absolutely no way for you to program the thing. I'd suggest getting the digital one because it's way easier to use than the other one. Point being: ESC won't work without a programming card for setup purposes.
My personal recommendation: go with a VESC. You can configure way more with them and you'll have an overall better experience. They're worth the extra buck compared to a normal ESC.
When it comes to VESCs in particular absolutely advise against ordering them from Enertion though. They might some of the cheaper places to buy them from, but the last time I bought two VESCs from them, they kept telling me that they're gonna send them out "this week" and ultimately I got them about three or four months late.
Alternatively - there's dual ESCs you can get from alienpowersystems or diyelectricskateboards. A bit more expensive but probably the simplest solution if you don't care too much about tweaking stats on a VESC.
Battery wise - there's a relatively cheap turnigy Lipo battery out there
. It's a 3s 8000mAh pack which is great because of how flat it is. Meaning it fits better under your deck.
Have you thought about remotes yet? My recommendation - go Aliexpress on this one
Cheapest ones you'll find, I actually have that exact one right in front of me on the table and it works great. Good signal and very trustworthy. You can even get a second receiver (for that dual motor/ESC build) if you ask the seller for it. It's like 8 bucks extra if I recall correctly.
I think that's all for now. Hope that helps!