If it makes you happy... cut it to length.
I faced the same struggle with a "Richard" double barrel damascus steel, 12 gauge w/exposed hammers. I bought it for a really good price, with the intention of making an authentic looking coach gun...But when it arrived, I hesitated a while, before I took a saw to it and finally turned it into a coach gun.
Looking back, I don't regret it at all. But of course my Richard brand, Belgium made shot gun, from the 1890's, isn't exactly a sought after collects piece.
But I say...if it makes you happy...go for it.