Ohh my...
I take it you didn't read anything here or elsewhere about Huffy bicycles for motorizing before not just buying one but two Cranbrooks to motorize?
Are you just going with pretty light low power motor kits like a 38cc rack mount hub-rubbers or 400W 12V electrics for neighborhood riding?
Most any bicycle will hold up to that for awhile and be fun.
But if you bought 66cc motors you plan to spend an extra $60 on each replacing the entire back wheel right?
Or are you just building cheap Christmas toy bikes that are fun you play with hard a lot for awhile but broken and discarded by summer?
Huffy's and every other $100 'Bicycle' at Wallyworld aren't adult bicycles, they are cheap Chinese kids toys designed to need replacing every Christmas.
If you want real rides my professional advice is take them both back and then go to a real bicycle shop and buy one good $200+ real bicycle for your first build.
See how they go together and what they take to maintain, get a feel for how you and the other party usually ride, then build another better one so you can ride together.
I have built 50+ bikes, mostly high end, and seen that many more I didn't build for repairs the last 3 years so I have just documented first hand what you want and what to stay away from, and for you the bottom line is don't start with a frigg'n cheap bike and a Huffy Cranbrook is the worst for anything but a short lived 'pretty toy'!