I may be out-of-line here, but I don't think you will get too many responses to your offer. Here's why I think that;
1) MMV's (makers of mutant vehicles) tend to be self-motivated. Otherwise they would be RMV's (riders of mutant vehicles). "outsourcing" a crucial part of your mutant vehicle could result in it not being completed. Waiting to hook-up with someone in Reno that is SUPPOSED to have the rest of your creation is risky.
2) Often there is not exactly a written down plan or design - they just evolve. Concurrent developement miles apart would be difficult, and cannot be verified prior to arrival at BRC (and likely cannot be fixed once there if it is wrong)
I would suggest that if you want to get involved in Mutant vehicles you do one of three things;
A) Volunteer to work at the DMV (department of Mutant Vehicles). This way you can see 1st hand what Mutant Vehicles are all about.
B) rather than work on a mutant vehicle, create a piece of art FOR mutant vehicles. IE- a whimsical "gas station" or "car wash" or "drive-up beverage or food stand" or a "parking lot" or a "radar speed trap" sign, or traffic signs that make no sense, or "XXX miles to Mars" or something like that.
C) once on the Playa, talk to Mutant Vehicle owners until you find one that you get along with, then volunteer to help crew their vehicle for a few hours.
see you in September! regards, Jafe