Found this lady online doing a bunch of car-related videos with her husband. But she also likes to make quick videos testing her strength. Gotta say, I love it and hope she does more of it. She doesn't ever really give her measurements or weight - but she's built a lot like a couple of my ex's (also thick, strong black women). I'd never seen that arm exerciser machine she's got in the one video before, but looked it up and it's only about $40 for one off Amazon, and it does claim it takes around 440lbs. of pressure to close it on the hardest setting.
https://streamable.com/g2tqpy
And here she lets her 300lb. or so husband jump up in her arms:
https://streamable.com/gpfuj0
Nice job pushing their car up a dirt incline:
https://streamable.com/nyka06
Picking the back corner of their truck up off the ground:
https://streamable.com/ycm36u