pics would help.....by failing that....I have a stock 74 box that i am willing to part with.
In what condition is your 74 airbox?
The one on my K4 has that rough, sorta flaky surface. I've heard of ways to make it shinier, like baking it, using a heat gun, sanding it with steel wool, etc. I was thinking of soaking it in something, or painting it.