Looking for more pep off the line

Just my $0.02 on the tire size. The front tires appear to be close to original size. Effect on gearing, speed and acceleration, absolutely zip. It appears the OP has installed taller and wider rear tires for the rake they provide. Yes the tires change the effective final drive ratio, but are not the big issue. If the shift linkage and kickdown cable are not adjusted properly the transmission could start in 2nd gear. Yup, that is not aiding getting the car rolling. If the throttle linkage is not pulling the carb to WOT, it is not performing the way it should. If the ignition is not set to function with the rest of the parts, it will not perform.
Now y'all can pick on the 3.23 gears, but it could be 2.75 or 2.56 like emissions GM and Ford. For racing the torque converter is not in the range needed, but for street and the gearing it is not bad. Without a lockup feature the converter will still be slipping a bit which is not efficient.
I do believe the cam selection was not the best, but considering that is what is installed I would recommend verifying all adjustments and the tune is correct.
These days with the cost of fuel switching to lower gears is likely going to hurt fuel economy which can be a big hit in the wallet, unless an OD trans is also installed. Does a trans shop offer a kit using the GM 700R4/4L60/65e transmissions for installation behind the SBM engines? The 3.07 first aids acceleration and the .7 OD lets you run down the freeway at low RPM sipping gas. Yah, I know, a transvestite. But sometimes you have to go with what works. I have no knowledge what ratios might be in Mopar OD automatics.