Ok... i have a very odd combo. I have a LT1 that has the efi connection 24x conversion to use the LS style PCM and eliminates the Optispark. This engine is a turbocharged engine (88mm). So far things sound fairly normal... but here comes the twist... THe engine is in a 1995 Ford mustang and I want it to be truly flex fuel compatible. I started this project a few years ago. i recently changed jobs ( I am now a automotive service technology instructor at my local high school career technical center) This stagnant project has now become a very active project that my students are excited to complete. Since I have no tune to start out with and the engine is turbocharged ( I intend to use a 2 bar map sensor) I am interested in a COS that will allow the use of a 2 bar map. Can I use a COS for the 12579405 tun and copy the flex fuel tables from the 12216125 flex fuel tun? Any suggestions welcome..... P.S. I have a factory GM Flex fuel sensor from a 5.3 Z code truck.