No, you just have to run the emmisions control stuff off of a TBI truck, which is my case was the evap canister, cat, fuel restrictor, etc, probably less than you have now. On a gas truck, they may not even notice, I had to get mine recertified since mine was a conversion from diesel. Call the emmisions tech place at 303-744-2442 ext.3 for all the info, they are quite helpful and they are the ones who call the shots as far as conversions are concerned.
Pete
'83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
'97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd