Jtrux Posted July 2, 2017 Share Posted July 2, 2017 I'm going to be purchasing a 4.0 from a 91 and before any money exchanges hands, I'd like to know how to identify onw over the other. The engine is not in the truck so I want to make absolutely sure it's what I want before paying obviously. Link to comment Share on other sites More sharing options...
HOrnbrod Posted July 2, 2017 Share Posted July 2, 2017 Check the block casting number. 1987-90 53005535 (8933002665)1991-95 530084051996-98 530205691999-04 53010449 Link to comment Share on other sites More sharing options...
Jtrux Posted July 2, 2017 Author Share Posted July 2, 2017 Perfect. Thank you. Sent from my LGLS992 using Tapatalk Link to comment Share on other sites More sharing options...
omega_rugal Posted July 3, 2017 Share Posted July 3, 2017 Check the block casting number. 1987-90 53005535 (8933002665) 1991-95 53008405 1996-98 53020569 1999-04 53010449 which one you think is the best when it comes to strenght? durability? less known problems? Link to comment Share on other sites More sharing options...
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