I have a 93 Cobra, I posted some specs here awhile ago but I have a question for you guys. When I bought the car it had 42 pound inj. with a matching C&L meter. I pretty much drive like an old man, not much horseplay. Since we had nice weather Tuesday and today I had the car out and I noticed when I nail it at low RPM's it stumbles, and almost sounds like a backfire inside the motor. Am I to assume it's because the large injectors on a stock 306? The car at one point had a novi 2000 on it, but I bought it with no blower. All the brackets for the blower are there, everything, just no head unit. I was going to buy another blower, HOWEVER I was told the GT40 heads are no good for boost, and when I bought the car the PO told me he kept going through head gaskets. If i need heads that will take boost I'll have to wait for more $$ to buy a blower, will the 42's hurt the motor? What I considered doing was a set of thumper heads and one of the new gear driven Powerdyne blowers. What I find odd is the car will sit and idle fine, smells a little rich, but it stumbles at low RPM pulls, and suggestions would be cool