For now I can only talk about my Syclone.4.3/262 CI V-6
Factory ECU,but has a switchable boost & timeing settings.
It dynoed @ 386 HP & 550 Ft lbs torque @ the wheels.
Gas MPG is 18-19 MPG & it runs low 12's in the 1/4.
You need a muti port fuel injection, not a throttle body injection.
MBHD
