Sounds plausably, i can tell you that when i switched to alcohol on my Malibu with under the chassis headers, i would make a pass and could barely drive back to the pits and then threw up from the fumes. I had to install turn outs to keep the fumes out of the car, and it's a stock firewall and floor bach to the wheel tubs. I know a lot of sprint cars donot use turnout on the cars and this i have never understood. If running alcohol a person should absolutly use turnouts to keep the fumes out of the car.
Not my opinion, but fact.
Zip.