Yes, not as trivial, but still is possible to try.
I have test implementation in Vivado, 2 cores * 350 MH/s = 700 MH/s in K7 325t.
Is it a good hashrate?
Yes, but not for a $1K board, GTX 1060 has a similar hash rate.
Did you get your design to PAR without errors? If so, how long did it take?