if you are willing to take the challenge. Nowadays, with Kleemann, Brabus and even with MB going to Kompressors instead of normal aspirated engines to increase HP. Would it be cheaper to go "normal" aspirated vs kompressor?
Plus, I am not sure if with the kompressors you need extra work with the transmission, intake, exhaust, differentials and (you did not mention) brakes.
Maybe some of the gurus here can give us the inside...

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J.H.
'86 300E