Wow! That sounds amazing. I read about someone doing a turbo 3-stage vtec motor which yielded some amazing h.p. as well as 50+ (I believe) mpg!
I'm particularly looking forward to your work on the suspension, your skills are far beyond mine!
60-65 mpg sounds incredible.
I'm looking at a stock VX engine /trans swap, some minor aero mods and highway speed under 65...I'm just hopeful that 50+ mpg is doable with the stock Z1!!! (although the thought of total sleeper mode in a sedan that gets 60 mpg sounds awesome. But again, your skills are waaaaaay beyond mine. I might have to pony up some cash down the line.) Great work!.