Either charger will be ok with stock fueling, but like stated above, we recommend atleast a 45% over injector to get some of the manners back like a stock charger. Our DP68 will make more power down low vs the 4094va, and alot of that is the exhaust housing design. If you plan to go big later down the road, the 4094va will be the best route because you can upgrade, and it will make more power higher in the RPMs. I've had both on my truck, and I will be honest, the 68 drove alot better with my 45s, and now I have that with my 72mm, but I have 100% overs. Its always a battle, you have to lose to gain. Give me a call at the shop if you have any questions.