Current mods are in my signature.What would the mildest cam and stall converter add in HP.Car must remain totally street and highway driveable. Thanks

 

The converter isn't going to add any power per se (it will be more efficient than the stock converter, however), but it will allow your car to "skip past" the dead zone of the bottom-end of the RPM range. LS1s make peak torque at around 4200 stock, so a converter change on even a stock motor will probably chop your ET down by at least a half-second. I'd recommend a 3200-3600 stall minimum on these motors, but they benefit greatest from a 3600-4000 or a 4000-4200 with modified motors and mods that increase the peak torque RPM.

A cam change (even a mild one) will add a ton of power. It's not unlikely to see anywhere from 40-70rwhp with a cam change on an LS1. With a smaller cam, you'd probably see somewhere close to 380-390rwhp with an auto.