EFI Conversion

You're wrong about timing control not benefiting a street car. Timing is way more important on a street car than on some straightline limited use car.

You also don't need such a (stupid) large GM-style distributor to be able to use a HEI-ignition.
A simple Mopar electronic distributor can trigger a HEI-module just fine and run without a ballast resistor with a more modern (better) coil.

Absolutely. If anyone can add digital timing control DO IT!

On my Holley EFI, I used a LEAN BURN distributor since its a solid shaft without any timing advance. Then just ran its reluctor signal to an HEI module mounted to a heat sink on the firewall.

65 Dartman's $25 HEI mount looks even easier than a firewall heat sink
Mopar HEI Conversion

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