Cormier... 1080 (and I believe 754) both have personal experience with the Amen Savior. 1080 drag raced a hot one but (as I remember) ended up going to solid slugs in the rear due to spring bounce.
However, according to the word on Hondachopper, the jury is still out on the Savior tracking. If the bronze bushings are poorly maintained then, yes, the rear can feel loose. But, many owner/riders maintain that they've never experienced poor handling from the Savior.
I picked up an unused Savior last year from JLeather and am slowly putting it together with a prism tank and HA mags. Should be an interesting rider, and if there is any issue around safe handling, I'll definately replace the sliders inside the springs with slugs and maintain the outer springs for looks.
Go for it, Dude. The frames are not expensive and the bikes don't weigh nothin'! RR