I have what I believe to be a late 60's chevy frame under my hotrod project, possibly from a chevelle?
I located a serial number on the frame and Im hoping someone will know what it might be.

the number is on the drivers side frame rail beneath the trunk.

#3960733S271
below the first is 9 3 S 2 XU

thanks for looking,
B
http://i28.photobucket.com/albums/c211/bfreehill/P1010105-1.jpg

September 3rd.... is when it was made. What is the VIN that you found?

OH!!! here it is.... '70 Buick Special (Skylark) 2door sedan and hardtop except GS455, Olds F85 (Cutlass) 2dr sedan and hardtop

Thanks Dwight!

The 733 XU frame is the right one for a 1970 Chevelle, or 442.