Muscle Car Dynamics’ 1977 GMC Shop TruckApril 3, 2014July 28, 2020GMC A few pictures of Muscle Car Dynamics’ 1977 GMC shop truck with a 6.2L L92 and 4L80E transmission swap. Source: LS1Tech Related Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Send new articles to your email inbox. Notify me of follow-up comments by email. This site uses Akismet to reduce spam. Learn how your comment data is processed.