What's this all about? Dual pickup electronic distributor?

[Bret Tschacher]

IF its longer than a small block its the 440, quick google search will find this.

Mopar LA engine – 3.875”
Mopar B engine – 3.5″
Mopar RB engine – 4″

Ok I'll take your word. I knew there were 3 shafts for V8;s. I just forgot which one of the shafts fit each block. It's only been like 25 years now since I needed to know this.