Swatter0

Can someone speak to this? I have been told that on original 63 corvettes with the RF stamping assembly date codes the letters "F" that appear at the beginning and at the end are different in size or characteristics? For example, if the assembly date code was F0503RF, the first "F" would be different in appearance than the last "F"? It appears that the "F" on the end has a shorter middle line, while the first "F" has a fairly even top and middle line so they almost appear to be the exact same length? If someone out there who owns an original 63 Corvette Fuelie would take some pictures of your engine stamp pad and post please? More than one original car would be nice to compare. I believe I have located the long lost original motor to my car, but I'm trying to verify the stamping as being original and correct before I hand over the cash? Thanks so much! Chuck