Original sentence: Between 1964 and 1966, Oldsmobile named its least expensive full size model the Jetstar 88, with which the Jetstar 1 was not related to, and priced $500-$600 below the Jetstar 1.The Jetstar 88 was basically a B-body on an A-body chassis giving the 88 line the most inexpensive model
Edited sentence: Between 1964 and 1966, Oldsmobile named its least expensive full size model the Jetstar 88 (priced $500-$600 below the Jetstar 1), but that car was not related to the Jetstar 1.The Jetstar 88 was basically a B-body on an A-body chassis, which gave the 88 line the most inexpensive model