Hey Sky--just got through re-reading your thread on the black Cuda build. That ride is awesome and of course the black paint sets it apart. Just some comments about posts others made:
1. If you are building a street cruiser then a cage becomes just an accessory like a radio. Neat to have but not required. If you want to go run 8's in the quarter at the strip then mandatory. Some like them, some not. I wanted to go 8's so we built mine to comply with SFI specs and NHRA/IHRA rules.
2. Using a motor plate. I have one along with a mid-plate. Again, street cruiser doesn't need one but if you are looking for the most precise way to establish the centerline of your drivetrain then a motorplate allows you that flexibility. It also gets you started on getting rid of alot of the factory suspension and into aftermarket items such as struts, fabricated a-arms, new frame rails, etc. Lots of work and money but necessary if you plan on going really fast.
3. Header tube size. I like your idea about letting the dyno tell you what size it likes. Of course, if your combo likes 2 1/4" with a 4 inch collector like mine did then you are looking at $1500-$2000 for a custom set made unless there is someone mass marketing them.
Just my thoughts. Keep up the good work.