smog is not an issue, my rigs are licensed in a none emissioned city. 3.4 is what i plan on doing since its such a straight forward swap, ive driven my brothers 99' runner around and it gets up and goes great with all that weight(fully loaded sr5).
a pic for fun, my boy loves going wheeling, and no he never rides in the back
![](http://i124.photobucket.com/albums/p15/altron32/IMAG0486_zps599a0fa3.jpg)