So folks, I know its Christmas but I am bored and decided to list all the sites that document my 455 block casting number 483677 as an HO block. For all of you folks saying this is a non- HO block please send an email to the sites listed below.
Wallace racing list the 1971 casting 483677 as an HO motor
Wowmusclecars.com list the 1970 YC motor as a GTO HO motor.
Transamflorida.com or trans am specialties list the 1970 455YC motor as an automatic HO motor
Butler performance specifically calls out a 1971 455 with a casting number of 483677 as an HO
pattersoncoachworks just says the 1970 YC motor is a GT0 motor
wildaboutcarsonline says the 1971 casting 483677 is an HO motor
pontiaction.com state casting number 483677 is an HO block
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