Well it depends on what kind of "comp" skis they are. Lots of old straight skis will be too stiff and cambered to be really fun in moguls IMO but if the flex and length feels good to you I say go for it.
That said you can probably find some used dragonslayers of F17s online for pretty cheap too. DOn't know what your budget is but it's worth a look!
"I know you believe you understand what you think I said, but I am not sure you realize that what you heard is not what I meant."- Alan Greenspan