when was the first year or the lt1 chould you get it special ordered in 85+ ????

 

The first year of the LT1 engine was 1992 for Corvettes, and 1993 for F-Bodys (Camaros and Firebirds). The introduction of the LT1 into F-Bodys marked the change into the Fourth Generation F-Body. It was also available in other platforms for a number of years, including Buick Roadmasters, Chevrolet Caprice 9C1s, Chevrolet Impala SSs and I believe a Cadillac platform as well, however the 'Vette and F-Body versions were the H.O. versions with aluminum heads, larger cams and more aggressive tuning making approximately 305 horsepower.

In '85 the best you could get in a 'Vette was the L98 (350 TPI) I believe, in F-bodys the best you could get would be the LB9 (305 TPI) or L69 (H.O. Carb'd 305).

Check out this site's "Tech Data," the link is on the main page but I linked it here for ease of reference:

https://www.thirdgen.org/tech-data