torque converter question: Which to use?

[brothers69c-10]

I finally got around to going through the 427 tall deck for 78 chevy 1/2 ton 4x4. I opted to get rid of the solid lifter cam that was in it for a hydraulic cam cause its easier for me to set. My truck has 3.08 gears and 31 inch tires and with the last two motors that have been it i have had lots of problems transferring power to the ground. The one motor with the cam that was installed was recommended that i use a 3500 rpm stall and i also used a 2200to2800 stall behind the same motor. The problem was always the same i couldn't build rpms in the power range before it would shift with the gearing i have in the truck right now. Long story short i am trying to get the truck on the road and be driveable for a while and use it to pull the trailer short distances. I have axles with 4.10 gears that i will be putting in the truck later on this winter along with a lift kit and 37 inch tires. I really don't want to have to drop the transmission out of the truck again to change torque converters when i do this.

I know that 427 tall deck's are known for their low end torque. i just want to make sure of this so i know what torque converter to use. Here are the specs for my new cam. I'm not sure how to read them exactly so i don't know where the power band would be.

Rocker arm ratio:1.7

Lift intake @ valve .475

Lift exhaust @ valve .500

Cam timing @ tappet lift intake 266 degrees

" " " exhaust 276 degrees


I have a stock heavy duty torque converter,

a 2200 to 2800 stall converter

and a 3500 stall converter.

I also have access to a 2000 stall converter.

the transmission is a TH400.

If there is any other information that is needed i will try to provide it the best i can. Any and all suggestions is apprecitated.