Q: I want to put a fuel injected LS1 engine into my C3 Corvette Stingray. The car has a 4-speed transmission, air conditioning, power brakes, and power steering.

Can you tell me what major obstacles I’m likely to run into? Someone told me I’d need a new wiring harness and different hoses for my air conditioning, power brakes, and power steering. Anything else I should know?

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back rear shot of the luggage rack on a 1975 c3 corvette stingray
(Image/OnAllCylinders)

A: LS engine swaps are extremely popular for good reason. The engines are readily available and are a great way to add improved technology, better drivability, and more power to an older car. You shouldn’t run into any major headaches, however the mounting brackets from your original engine accessories will not fit on an LS1.

As you already suspected, you will need to install a new wiring harness and modify your hoses and your oil pan. We suggest grabbing a Painless Performance LS1 wiring harness. It has color-coded wire and comes with detailed instruction for simple installation.

Also, a set of Trans-Dapt engine-swap motor mounts will hold your new LS1 securely in your Shark’s engine bay. Of course there’s more involved with the transplant, but it can be done and should provide great results.

Check out our LS1 engine upgrade guide for more detailed information to help you maximize performance for your build..