[quote name='Sibob' timestamp='1439708117' post='2845066']
Absolutely no reason why not.
You'll likely need to fit a new nut, otherwise the strings will not sit nicely in the larger slots.
I've found I'm not keen on C strings on larger frets though
Si
[/quote]
Agreed on all points. One of my fives is strung with a high C and, just to make life a little easier for you (and in case you didn't already know) Warwick make string sets with a high C and, so far as I'm aware, are the only made-up sets available. Happy to be proved wrong. I get mine here:
http://www.stringsdirect.co.uk/strings-c1/warwick-warwick-5-string-black-label-25-105-high-c-long-scale-bass-strings-p8258