Question about electronic ignition for big block

[THE ZUKE]

If your distributor is not worn out (it looks quite new) there is absolutely nothing to be gained by changing it to an MSD. I believe you will gain gas mileage if you connect the vacuum advance. You can hook up your vacuum advance by just buying a piece of vacuum hose but listen carefully for detonation (rattling noise) on acceleration.

Ok thank you for your analysis. 
Firstable I will probably change the 8 cables that are very short.

[THE ZUKE]

The MSD distributor you are looking is what MSD calls ready to run type. Meaning the electronic ignition and timing control is build inside the distributor. It is definitely an option if you are converting from the factory dual points ignition system and not to worry about ballast resistor using the factory electronic ignition system. Recommend you download and read the instruction first.

Looking at the pictures, the electronics on this distributor is only protected by the distributor cap just like the GM stuff. Also check out the installation addendum using power from battery and a relay trigger by the ignition switch.

Ok, Thank you for your explanation.