Yup, I have to agree. I have the 390HP version, only difference is R/T heads. I run msd stuff with a custom 10* bushing from this site. I run 22* and 32* w/ a light blue and light silver. I have 3.91 and an a body 833 with the low first gear ratio.
I currently have that same 10 degree bushing in my car as well. It idles really nice. I did take it to the track once with the 10 degree bushing and my 60' and ET are suffering. I can't say for sure if it has to do with the distributor and curve set up, but I suspect it does. More track testing is in order. :D
