I have been speaking with the folks at MAF about their engine kits and more specifically their RV cams. I am going to overhaul a 2F that I am getting a sweet deal on from 3_puppies. Thanks Paul! My plan is to install a TBI kit from Affordable Fuel Injection. The guys are telling me that I should stick to a stock grind cam instead of an rv cam. Their reasoning is that the TBI is very sensitive to vacuum and that I would see a significant drop in vacuum with the RV cam. I have read many posts, including Trollholes, and have not seen anything written about a drop in vacuum. Can someone help me put this issue to rest! Will installing an RV cam truly result in a significant enough loss of vacuum to impact the operation of the TBI system?