MY dyno and ET slip, What do they tell you?

i agree, you need a better fitting convertor, not to loose -so you can utilize the tork of that 422, but looser than current convertor. you still have lots of room for more power bigger cam-more duration/more lift, and have the eddys ported . then it will run in the 10s with a tune and traction with 4.10s my 2 cents.