if its going into a truck, and these are the only two engines to choose from, I would go for the 3 port engine:
good allround performance.
the 5 port engine would have more power up top but less on the bottom, so considering its going into a truck the 3 port might seem more powerful than the 5 port.
One question: why an onroad engine into a truck?
I would just slap in an OS 18TZ - fantastic engine, ballistic power - all unmodded and runs great even on a random pipe.
Car-less (Velox V10 or 733) // RB T10.5"+" (JB Modified) // Bluebird BMS-990DMG (St) & BMS-631 (T/B) // ATS 16% // Capricorn Wheels // Protoform
"70% of the time, it works ALL the time"