Never seen a pea fowl egg but duck and goose eggs do on the large side of the spectrum and button quail eggs on the other side so I would guess they should fit
I'm pretty sure they'll fit in an LG. I have a Hovabator 1602, about the same size I guess, & our peafowl eggs would definitely fit in it. Also, a lady that we bought a few peahens from last year used an LG to incubate their eggs. Good luck.