Hmm...
well, I'd like to hear from you specifically what you mean by "space wolves 13th company". If you are specifically referencing the Codex: Eye of Terror supplement, then I would start by saying that this particular book has been illegal for tournamnets for quite some time, its out of print and being phased out. Every army except the space wolves that has a sub-list in there has received their new more updated codex. (or in the case of
LAtD, has received their walking papers). I'm going to guess you aren't a hard core tourney guy, and has access to a gaming group that doesn't care about it not being legal. I would gladly play a person i hadn't met at a store who was using 13th co rules, its just a matter of the support you'd get from
GW. (none)
As for how well a space wolf army would do in 5th edition, especially one with ultra-elite uber troops choices. I would say that if you focus on grey slayers, build an army around them you will make the adjustment quite well to 5th. being overly reliant on bikes may lead to you not having enough scoring units. I can't confirm that as i haven't done any 5th ed testing with anything similar to a 13th co. list yet.
If you come back with a few more details about your planned project, i can give you more feedback, I've played tons of 5th ed test games, and have a lot to say about it. And if I've convinced you to give up your planned project, and you have some wulfen for sale, i'll pay top dollar