Ah....found my answer.
http://www.ls1lt1.com/forum/pcm-tuni...dded-opti.html
Turns out the Opti by itself won't work with the 0411, which is something I sorta expected.
For that 24x setup, how much of a difference do you notice?
EDIT - Yeah, I know about when the tone wheel came into play. I'm building the LT1 from pieces I'm getting from CL and ebay, but *would* be putting the 96-97 timing cover and reluctor into it.
EDIT two - Brainstorming here. Couldn't I mod the timing cover with a Hall-effect type of cam sensor (a la 3800 Series II) and position a magnet on the cam gear?