Good or Bad idea??

I have been trying to find someone who has experience with this package, but have not had any luck. The Scarebird stuff is for the 4" bolt pattern, so for the people looking to keep their origional/4"/A body wheels that appears to be the way to go. I want to move up to 4 1/2", so the other alternate is to go the B/C/F junk yard parts, but there are some detractors going that way...the largest for me is that you still need late model A UCA's. There are after-market companies that make these, but they want $200. By the time you source and rebuild all the MOPAR parts I'm thinking that the $575 sounds fair for the Engineered Components package. I just wish I could find someone who has experience with this company.