1966 Corvette 427 & M22 Trans

[Viper69Z28]

Hey guys Thanks for all of your helpful knowledge.Well I spoke to the guy today to try & get more information but he is not willing to move on it & just keeps telling me to come on saturday just like we planned and look for myself.I am going for sure to check it out.I have a question still about how to tell if it is a real 66 M22.I know I had a M20 from a 66 chevy of some sort because I remember it having a 6 in the sequence P6M30A could this be right or just a miss print.I know I've heard someone say that the letter sequence started in 69.Also I have not looked at alot of transmission gears is it easy to tell the straight cut gears M22 from the regular M21 & M20 Gears.Thanks again for all the help Irvin