Flywheel questions

What are you running, and which 8 bolt pattern is it?
The 8 bolt cranks for LA motors that were offered by DC/MP and others used the Gen2 Hemi crank flange, the Gen3 Hemi has a different 8 bolt pattern (the Viper V10 also had 8 bolt and was yet another pattern, as did the Gen1 Hemi, but I'll assume that's not what you're running). None of them interchange, none are cheap.
If you're running a Gen3, you could check into a flywheel from a 4.7, which had the G3 Hemi pattern, and have it turned down to accept a 130 tooth ring gear.
An option for the LA would be to have your 6 bolt flywheel redrilled to the 8 bolt pattern- I wouldn't run it on the street, but it should be okay for idling on a run stand.