If your compression ratio is at least 8.5:1 or lower, and you're willing to part with EFI, and you can get some fairly simple parts fabricated or fabricate them yourself, you can turbo it yourself. If you're not willing to part with EFI it will easily triple the cost for the same peformance. It still won't cost 6k though. Just depends on how much of your personal time and effort you can afford to invest, and what your goals are. I'm sure Mosselman makes a very clean product, but with their limit of .4 bar boost, they are definitely playing it safe and not really giving you your money's worth, unless bragging rights are more important than peformance. Not trying to anger anyone here(except maybe Mosselman). With the type of simple system I' discribing, you can easily get 400 hp out of a Mopar slant six w/o torching it on the first run. How clean the system looks is up to you. If you're intrested let me know and I can go into greater detail. Either on list or off, makes no diffrence to me. Be forewarned though, EFI guys freak out if you even insinuate that a system that doesn't use it can even make it out of the driveway.