It is not a huge job, do a search on here and you will find a couple "how to" threads and wiring diagrams.
Get a wiring diagram for your car and for the model EFI (i guess) system that you are putting in if aproached methodicaly it is a good way to learn more about your car, wiring is one part of your car that if done carfuly by an ametuer can get as good a results as a pro.
If not just pay someone like you said.
regards
jon
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