With E85 now showing up where I am...if I end up having to use it what's the most modern...and straight forward swap I can do, where the swap part are already made?

For my '90 LS. I've seen these two mentioned.

K20a2
H22A?

Thanks

 

Ok? no suggestions, but I've looked at the K20a in a number of configurations. One from the Civic made from 2007–2011. I tend to think the newest I can find would do better on modern fuels as time goes forward. It also has 159 Lbs. of torque. I like that.

Hassport said their mounts for the DA and K20 will go on any K20a, with the EP3 or SI 2011 transmission. Which one is the LSD 6 speed trans?
Any opinions on that?