Those 5.0`s or 8.3`s ?
How big are the engines?

8.3s and they’re 588s

Keep an eye out for fuel distribution.
I modified my intake with an extra 8 injectors and 8 in the back of the blower . Then 02 sensors in each hole to make sure one hole wasn`t 13.5 and another 11`s
8.3l is a big blower, Whipples like rpm, turn em too slow and fuel distribution suffers, as does idle. It`s hard to turn it fast with 600ci and below unless you`re running high boost.
The biggest IAC lines possible (I went -10an) helps idle.