hey guys. been a while since ive been on here. I recently wrote off the last 12v cummins and bought a new to me one. New rig is a 1 ton 5 spd manual and my old one was a 3/4 ton auto (both 1995). first thing i notice is the whopping amount smoke coming from the dual smoke stacks, dont get me wrong i dont mind a bit of smoke but holy hell if the cops dont get me for speeding theyll get me for smoke and i cant have that. the other very noticable difference is the lack of top speed i have in the new one ton. my old 3/4 ton, i couldnt find my top speed.... new one tops out at a dismal 120km/hr in fifth gear. Not sure what kind of fuel plate or gsk is in this new truck yet, but it has cold air, egt and boost guage and obviosly some kind of tuning not sure of the status of the AFC either. basically my issues are the smoke and my dissapointing top speed..... any discussion this post can generate is much appriciated. im not very mechanically inclined and require alot of guidance, however i do figure i know enough about the 12v cummins to hold a conversation about em.