[jetblue69]

I have a 850DP with mechanical secondaries and 4 corner idle I rebuilt myself. I did have Holley re-dichromate the carb since it was previously installed on my Chevelle big block car... I eliminated the choke and did the tuning myself (if you are not familiar there are a couple of books out there that have VERY good information). I understand that not everyone is a carb guru and that small businesses need to make money but I really try to shy away from paying for something I can do myself. I personally find that Holley carbs are VERY EASY to tune given the basic knowledge set. My main advice on the matter is, you can usually make a larger carb run smaller but not the other way around... within reason