it has been done my older brother had a ea71 with dual vw carbs back in 91
it had a rubber hose for the coolent cross over
not the best setup daul webers is beter
Yes it is hard on the car but I do it to my 84 tercel all the time and it has more flight time then most gyro planes and haven't broke it yet (key word yet)
AND IT NOT A SUBARU