Thanks for the attitude, kywheels, we live to serve.
A Steamer is a Tiger, not a Sprint. You're lucky your post got to the right forum.
The motor number is stamped on the case and does not match the VIN. There is no easy way to recover the motor number after corrosion has made it illegible. Sanding the area down with a Dremel is probably the easiest way to bring it back, but obviously requires care, precision, and refinishing after.
Cheers,
-Kit