I would have to say no since the Yenko had the 427 in it from the factory depending on the year. Unless you have original dealer documentation to authenticate it this would be an incorrect conversion to a GTO or Judge. I believe the GTOAA rule book states that in the case of conversions such as these unless there is documentation to support it must then be entered in the modified class or points deductions will occur. I guess to make along story short unless I had dealer docs I would not put a RA V between the fenders of any Judge I owned. I would love to own one of those engines but I have always been a purist when it comes to my cars and want them exactly as they left the factory. JMO
Happy New Year
