I have a 98 ls motor on a gsr tranny. We got it from a junkyard and we don't know the mileage. The engine code is b18b1 1319018 and the tranny y80-1019613. The head has the serial a308230212. Let me know if you have any info on the engine and if you are interested. I'm selling the motor for 1200 and will bring it to you if you are within the state of pa,nj,de, and ny. Thanks for looking.