Give it a try and keep your old pcm just in case it doesn't work out. That's exactly what I did. I've got the pcm, injectors, pulley and belt in a box and can switch back to 93 in a couple hours if need be. I'll say that e85 made an incredible difference in my car... Probably 50 hp with an professional tune. Went from a 3.2 to a 2.8. We are lucky here in S.E. Michigan and and have e85 all over.