E85 conversion?

I've got a '91 Toy 4x4 with the 22RE engine. E85 fuel is available
hereabouts and I'd really like to run it, but I'm not sure what parts in
the fuel system need to be changed. I'm running E20 now with no problem.
I'm thinking that the TCCS ignition should work well with E85 since
it will advance the ignition until the knock sensor feels detonation and
then cuts back a bit, so the higher octane will be utilized. I wish I
had a turbo with computer controlled wastegate so the engine would fully
be optimized for ethanol.