I'm 5'10" 250ish. I made some 2.2 Dyneema UCR's and used them for a few daytime hangs. One failed after a few hangs, but I think it was a splicing error. The other held up fine. I set them with prussiks but they had to be JUST RIGHT to prevent slippage. There were a few times I was lowered slowly, gently and inevitably to the ground. I'd try whoopie slings with it if I had enough to play with.

I have a 2.2 CL on my hammock that has held me every night I've stayed out since around June, so 10-12 total nights and it still looks like it's in good shape.

That said I'm a little too big, IMO to chance 1.75 stuff. Good luck!