What was your old rear end ratio? Divide 3.73 by the old ratio & multiply it by 19. This will get you close, unless it comes out more than 22. If novaresearch doesn't come back up, I'll see if I can find the sheet where I printed it out. At least I think I printed it out.
NEVER MIND, I HAD A BRAIN F@RT, & THE URL'S HAVE BEEN CORRECTED
www.novaresource.org/speedo.htm
www.novaresource.org/speedo2.htm