I got the exhaust put onto my chassis (still can't call it a truck quite yet).
Here are a few pics... it has 2.5" pipes that run into one Magnaflow muffler with a single 3" pipe out the back.
I also added a collar onto my fuel filler neck so that it will fit more tightly in the grommet.
I've cleaned it up since this pic.
I also found the fan I will be using. It is from a mid 90's Lincoln Mark 8. It is pretty large and draws a lot of current. I will most likely get a controller from Dave at Hollister Road, which allows a gradual and variable ramping up of the fan speed. I still need to alter this shroud to work with my core support.