Some help choosing a comverter

I have this combo in my 41 chevy truck. I've been thinking maybe it needs a different converter, I'm not familiar with converters so I'm hoping someone with expertise could tell me what would be a good one to buy. I use the truck mainly for shows and some Sat. night fun. Now it has a B&M 2300-2500 in it. Thanks
350 late style roller cam block

GM 350 crank

9:73 hyper pistons

Edelbrock cam 2204
Hydraulic roller tappet
Basic Operating RPM Range 1,500-6,500
Duration at 050 inch Lift 234 int./238 exh.
Valve Lift with Factory Rocker Arm Ratio 0.539 int./0.548 exh.
Lobe Separation (degrees) 112

Cylinder Head, Performer RPM, Aluminum, 64cc Chamber, 185cc Intake Runner,

Air Gap intake

650 demon carb

MSD dizzy, 6a, Blaster coil

350 turbo

3.42 posi

weight with driver 3340

guess at hp 420

41 chevy pu