that truck now runs a single blower,, on a different motor,,,both the twin and single blower motors are from big als toy box,,,he blew up the twin blower motor,,,
The owner of that truck said to me he's building a tunnel rammed engine for it.
About the carbs....fstfish66 is correct. Invest in a pair of custom calibrated blower carbs from any one of the custom carb shops. They cost a little more, but your engine will perform much better. Mine were built by Quick Fuel Technologies, and I've been very happy with them.