I have to say your quite resourceful Quicksilver!

Another crank sensor/trigger option if a damper with the 3 bolt GM pattern on front is used would be the Big Stuff 3 24 tooth wheel.

The OE LS1 computer and coils are good to 8000+ rpm. The tables in the HP Tuners software may stop at 8000 rpm, but the values maintain themselves at the 8000 rpm setting (flatline) when that rpm is exceeded.

Good Luck with your project, and please keep updating as you go.