use of an accurate vacuum gauge and a bit of experience makes balancing all 8 throttle bores fairly easy. I had crower mechanical injection on my 1968 496 BBC corvette for several years
theres certainly advantages to using alcohol ,
significantly cooler engine temps and a bit better power without any doubts.
but one thing I learned using alcohol in any race engine was to be damn sure you remembered,
to run the engine on straight 100% gas,with a dash of MMO,
for a couple minutes before you turn it off and park the car
if you don,t youll have an amazing amount of corrosion related issues in a car thats parked for a week or more between usages
my 1968 corvette with a big block 496, running METHANOL and crower injection, it looked vaguely like this picture,when I tried alcohol for a short time,
mine was Burgundy and a chrome bumper corvette of course
that required a quick disconnect fuel cell, so I could quickly swap fuel tanks,
I had a 15 gallon fuel cell in the corvette, filed with METHANOL, and a quart of MMO, and a jury rigged 5 gallon fuel can, filled with 115 octane gas and a pint of MMO, we carried separately , too the track,
with the proper quick connect connectors to run the car from for a few minutes ,
before we parked it for any length of time to reduce the chances of corrosion.
http://garage.grumpysperformance.com/index.php?threads/build-a-496-stroker-bbc.101/#post-15067