Fuel Injection Harness Questions? 89 TBI setup

[1972C10]

I have an 89 C1500 W/T With a 305/Th375 Im thinking about parting For the harness and a few other items

Question: Is How easy will it be to put this in an 85 C20 With a 350/Th400 It has a Rebuilt 350 Thats pretty much stock with the exception of an RV Cam

I was thinking about getting this Pump And putting it in front of my Dual Tank Selector Mallory 60FI

I was also thinking about using the trans kickdown off the fuel injection harness I bet its controlled by the TPS and Ecu I figure if it doenst act right i can always hook the factory Kickdown thats hooked to the gas pedal back up.



I have 350 injectors As well Im told that is the only difference between the 305 and 350 setup.

And if i was to want to buy a Chip for it would i buy one for a 305 or a 350?


I have acess to a 87 454 Tbi adaptor that goes onto the Q-jet intake and has water pass trough it

Its either that or slot a Tbi intake to fit my 882 heads Or put TBI 191 Swirl Ports The Engine I really dont want to do that unless i absolutley have to Since i only have 4000 miles on the heads since rebuild.

[1972C10]

This is the chip it has six settings

Even has the Loan truck to friend mode .


Economy: Gas-sipping performance for low-octane fuel.
Towing: Calibrates for effective towing on regular fuel.
Stage-1 Power: Power with economy on premium fuel.
Stage-2 Power: Ultimate power gains on premium fuel.
Valet: Low-performance operation for occassional users.
Anti-Theft: Includes a key lock that will not allow the vehicle to start, Even if the wires are cut!

[1972C10]

I called jegs he was able to find a part number for an 89 350 manual chip wich is what i think i need but he was unable to give me an answer If my 305 computer system would work right
He said the computer is calibrated for that smaller engine so im thinking of using the ecu out of another truck i have that has an 89 350 4 spd but use the harness off the 305 because it has no smog pump

But im wondering if the ecu will act funny since it was on a vehicle with smog pump and valves

[greg0380]

I just finished swapping out my qjet with a tbi intake (slotted holes), TBI, and ecm (1227747) onto my 85 305. It wasn't that bad. I went with a holley fuel pump.

YOu called Jegs and they can supply a chip for the ECM listed above??? The chip that came with my ECM was for a 5.7L auto, I want a 305 manual. How much do they sell that for?

If you have any questions on the swap let me know, maybe I can help..

[hills92]

i pulled my v6 5 speed out of my 92 and put a 350 with a 700r4 auto in mine and the chevy place told me that the compters for the 305-350 was the same just the inj were diffrent so they gave me some numbers i got one out of a scrap yard and with your year the chip is the same too

[1972C10]

They wanted 225 dollars but they have other chips cheaper i want that six pack chip you can get a chip for whatever you want im sure jets and hypertechs website had a chip for any kinda 89 w/t combo 305 4 speed 305 5 speed 350 4 speed 5 speed even had v6 stuff.

I have a chip in my 89 w/t 305 but its got a th375 but its not computer controlled so i assume its the same chip as a manual