So I was cruising around on youtube and who should be yapping at me? My dad. hehehe
This is a video of the Simmons propane turbo kit. My dad is the one that developed this kit. IIRC, my dad (Steve Benson), Val Simmons, and Brad Story got together an formed a company called HP^3. Dad was the idea guy,Val was the distributor, and Brad was the publicity guy. Now keep in mind I of course was not involved at all and may have it a little wrong. Plus it was a couple years ago.
So dad made the turbo and propane kits. I believe Brad had someone he knows make the propane tanks that fit under a custom seat. I’m not sure what Val did on these. Maybe he made the clutch weights or ported the engines or something. The turbos my dad used on these are a Tommy Makinen edition Mitsubishi Evolution turbo. I will see if I can dig up some old pictures I took of this kit when it was first being developed.
Well here is the video. Hopefully I can find some pictures for you also: