340 dog out of the hole/no low end torque??

Not enough gear, or converter with those giant tires...
You say it feels like it comes on at 4200, why would you not want a converter that would flash there?
30" diameter tires? You're drivin' around with 3.73s and 26" tires...with a huge weight penalty on the tires...

Because I'm not rich?? How would I have know it would of come in at this rpm before. I'm sure if I had unlimited amounts of money I could just buy conveter after converter. Lunati said at least 3200 rpm stall so I went with 3500-3800.
I got a tci because in canada it's harder to get a lot of the parts you guys can. So certain speed shops here can only supply us with brands they deal with.
If I was to get a custom one made from some specialty american converter company the shipping,duty and tax would kill me