Electronic Vs. Points

He's going the wrong direction if he want's performance out of an ignition system.
MSD, HEI, or even just a good strong coil with what he has now would be better than points.
Yea, they had their place in history but so did milking cows by hand.

Now from a business owners stand I say explain that to him and do it anyway if he still wants you to.
(Easy money for you, and the customer gets what he asked for)