Newman Car Creations in Templeton, CA specializes in c-4 conversions. We are having our 46 1/2 ton being revitalized at Campbell Auto Restoration in Campbell, CA. Our chassis was sent to them and they grafted the c-4 front and rear. This is not inexpensive(retired, spending the kid's inheritance), but Paul Newman's web site is a good source for info. If you look up Campbell Auto Restoration on Facebook, you can see pics of the progress of our "revitalization" and where the kid's inheritance went.