A little update here, got it smogged(very low emission numbers), got some cheap online insurance, and got it registered, so it's finally legal again

. Unfortunately it's limited to about 40mph because the driveshaft starts vibrating around that speed so until i get a new shaft I'll be renting a trailer for any out of town trips.
Probably going to hit up Prairie City near Sacramento or Carnegie near Livermore(for those familiar with the area) first as kinda a shakedown run to make sure everything works still and so if anything does go wrong I'm not very far from home.
And here's something I learned about the GM tbi system as a result of this build that may help others piecing together similar drivetrain setups in their rigs. The system doesn't seem to need a speedometer signal in order to operate properly because I don't have one feeding it and there are no issues with acceleration, coasting, braking, letting off quickly after acceleration, etc...keep in mind though that the tbi motor I used was mated to a 700R4 and not the electronically controlled 4L60E(not sure if that matters either because they both have their own computers). So for what it's worth and this is purely my opinion based on this build but I'd say that the tbi doesn't necessarily rely on a speed signal and can easily be mated to older, non-computer controlled transmissions.
Anybody with a definite answer to this feel free to respond. I just thought I'd post this because I've searched and read through many threads discussing this particular topic.