hey guys! I'm new to the forum and very green on efi, so some well intended guidance will be greatly appreciated. I've got a '96 c1500 that I stroked and poked to 383ci. Without boring you guys I'll try to list as many details of my combination as possible. I think my biggest problem is the stock ecm and stock fuel injection( spider style sfi). I'm thinking of converting to a blow-through carb setup, but maybe you guys can help me out first.

3/4 ton 4 bolt block
scat steel crank
eagle h-beam rods
hypereutectic slugs (9:1 cr)
edelbrock e-tec heads 170cc
small cam 110/120@.050 .513 lift
fully rollerized valvetrain
jet maf
bbk 85mm tb
procharger p1sc w/intercooler 7lbs of boost
th400 trans. w/2200 stall
gearvendors over/underdrive
.410:1 final drive
mickey thompson et streets 28"

My truck has run a best of 14.0@96 elev. 2200'. It weighs 5000lbs.
I had it tuned by the best guy in my small northern canadian town. (He's the only guy! LOL) Shouldn't it be quicker? One guy posting here says his fullsize 4x4 is running 12's with a v6!!!I know my heads and cam are small but the truck tows my ski boat and my camper at the same time so big horsepower parts won't really work. Sorry i left little to no info on my pcm tune but like I said @ the start of the post... I don't know s#!t about the laptop tuning!
Any help would be hugely appreciated. Thank you in advance.