The 104 HFM/SFI is a high performance engine. So you have to expect the sport performance .
There was a design leap foward when they got rid of Distributors and went with full Electronic Sequential FI. And b/c of Full electronic management, it was easy to add cam advance, HFM metering, and SFI, along with the intake resonance system. A great achievement and quite modern for that time.

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A Dalton