Well, changing the set up but not the thread. So far I have enjoyed e85, there have been a few hang ups. It's importan to keep your fuel system clean. I have found Teflon lines that should work with the fittings that I have. With the new hoses and filters the fuel system should be done. There is one more thing I am going to try, running a intank double pumper in parallel with external pump. So I can cruse with out the noise. Along with the fuel system, I am upgrading to a 4.1 block, a 72 turbo, champion heads and intake, roller cam, and finall a scanmaster "I might not pop another head gasket". Thinking wideban o2, 9" rearend, and paint soon.