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EG3 = single carby
EG4 = dual carby

EG is just as good as EK, just depends on how much TLC the car has recieved in the past. If your willing to work with your car it shouldn't make a difference anyway. The question is WHICH chasis do...

will the EK centre console with the armrest fit the same as the without?

qft!!

don't give up, in the end its definately worth it.