I've installed the Optix 7 color LED's on my Cruiser. it was a fairly easy install, except for crawling on the ground under the car, that was on jack stands... I'm getting older.....
If you have access to a lift it should help, lots!!!
I also reccomend, good sharp drill bits, the self drilling, screws that were included, would prpbably zip right through sheetmetal. I think you'll find, the steel under your Cruiser is a litle stronger...
Before I even got started on my install, I plugged the kit together and test wired it to the battery, just to make sure, that everything worked... then I was off and running...[8)]