Hi, finally we have achieved to convert the oem ignition system of my 1974 W115 230.4 M115 engine to electronic ignition system of original W123 M102 230E engine. However, we used the oem M115 ignition spark plugs and cables, except the main ignition cables (the green one and the black central one connected to the distributor cover). I would like to ask for the recommendations regarding the 4 ignition cables and spark plugs in order to reach the best acceleration and smooth running.

Thanks in advance,