hi starting a tbi conversion on 78 vette

[cobrareg]

just starting to piece together the harness and parts to start the conversion. please give me any advice you may have for this process.
thanks
reg

[dave w]

I think having a good wiring diagram is essential! I think either a Camaro or Caprice TBI systems from the early 90's are good systems to adapt for a Corvette. I like the fact that the Camaro and Caprice TBI system use a Manifold Air Temperature sensor.

dave w

[RobertISaar]

depending on what transmission is being run is what i would base my recommendation off of.

[cobrareg]

The current engine is the stock 350, 4 bbl. It is a 4 speed transmission. I added vortec heads to it a few years ago. I found a 89 truck tbi setup, minus the ecm and vss locally for $100 that I am thinking about picking up. It is supposed to have all the the sensors, wiring harness, tbi and distributor. Does that sound like a good start?

[EagleMark]

Yup, that will work for ya! ECM is about another $40. aftermarket VSS about $100. Lots of time and some tuning and you'll be stylin!

EDIT: It's off a 5.7L engine right? You need the 5.7L TBI.

[cobrareg]

With a manual trans, do I need to hook up the vss ? Some posts say I do and some say I don't. I was thinking about the in tank fuel pump. I've read that I can use the in tank fuel pump and sending unit from an 82 vette and it will work. Looks like the whole thing is about $170. Is this early wiring harness pretty easy to sort out, or will I need to buy one already tailored for the conversion? I can at least use a volt meter and trace wires.