MY choice to go with a 89 s13 coupe was one of price. An SR swap into an 89 with a KA24E is just as easy as putting one into a 91 with a KA24DE. A KA24DE swap into a KA24E 240sx is just a matter of getting the DOHC wiring harness from what I remember. My plans for the 89 were to build a motor for it anyways so having to purchase a ka24de wiring harness wasn't a big issue. But before I could purchase a spare KA24DE and start building I ran across one very nice red 95 Z28 6speed