Trying to pick a converter

[jimbos56]

I,m trying to pick one of these converters all are from FTI.
1. 9.5". 2400-2600 stall
2. 9.5" 2600-2800 stall I,m thinking this one.
3. 9.5". 2800- 3000 stall.
4. 12" 2400-2600 stall.
Car is a 2dr 56 Chevy
3:73 rear gear
27" tire
700r4 trans
L31 vortec 350
Heads have been modified to accommodate higher lift cam.
Cam is a lunati 2008130
Adver. Dur. 278/288
Dur. @ .050 219/229
.503 lift int/exh.
1800-5800
Full length headers
670 street avenger carb.
Has a 2100 stall converter now, very sluggish off the line.
Not alot of experience with torque converters, but I do know I need a higher stall to get this to move quicker off line. My problem is knowing how much more. It,s my street car,. But needs to be fun.