502formula

I see there has been some posts about these blower set ups, but nobody has really answered how they are. ive been looking at them and think it would be a cool set up to keep the fuel injection. i have a 95 509 mag mpi , wondering how it would work on there?? not looking for crazy power or to break the bank, but figured the b&m 250 with the efi setup might work good for me. just seeing what everybodys thoughts on these where. also has cmi headers thanks