Yes, I have his hand made, aluminum air box!  I believe I remember him saying he had the jigs made for all years of the 250.  It bolted up PERFECTLY on my 85'.  Really good welds. No problems with cracking. I'm positive he can do whatever you are needing.  The guy is good. And yes I have dealt with Shawn lol I believe he does these air boxes in his spare time and does a good job.  If anybody wants me to send them pics of my 85' air box, just pm me your cell number and I'll send ya pics.