Yes the 3.8 and the 4.2 are very similar and a fairly nice swap. But there is a few things that need to played around with. Mostly mixing and matching parts from both engines, like sensors.
The plate was from SSM (super six motorsports). And im doing meth because I cannot inter-cool. The supercharger heats up so much after the first pass that it retards the system a lot for the passes afterwards.
LilRoush had the first M112'd V6. If I remember correctly he never ran meth, and open tracked the car.
As far as PMing me, be my guest