Good writeup on SMS. Ive been seeing stories about people having problems with them. I didnt have any problems with my purchase with them.
https://67-72chevytrucks.com/vboard/...=512339&page=4
Here is a thread I started about The Rare Red Seat and on page 4 seems like the original 66 material is no longer available, and problems between the buyers and SMS. Proceed with caution when dealing with them. Has anyone recently dealt with them?