Mailbag: LT1 Corvette Intake Upgrade for a GM L83 LT Engine

Q: I have a Gen. Five, LT-series 5.3L L83 engine that’s going into my 1975 Chevy Monza. The factory intake manifold is too tall to clear the stock hood, so I need a lower-profile intake. Can I use the intake from a newer Corvette LT1?


A: Yes, the LT1 intake will bolt up to your 5.3L L83 engine. If you’re looking for an affordable option, AC Delco makes an affordable factory LT1 replacement intake manifold.

The inlet of the LT1 intake angles downward, so you may need to use Holley’s throttle body angle adapter to clear the engine accessories, or you can use ICT Billet’s Gen V alternator/power steering pump relocation bracket to route the serpentine belt away from the throttle body.

You will also need a 6.2L throttle body, because the 5.3L throttle body has a different bolt pattern.

Some tuning may be required for optimal driveability and performance.

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  1. cedric sanders says:

    who makes a gen v intake manifold for carb setup

    • Hey Cedric, Holley makes a modular Hi-Ram style manifold for the LT that accommodates a carburetor. But it may not be exactly what you’re looking for.

      Alternatively, there are adapters available to adapt the LT heads to LS-style manifolds. That could open up LS manifold options too.

      But you may be bumping (pun intended) into the same issue as above–hood clearance. You didn’t mention what kind of vehicle this is going in, but either of those two options above need more clearance than the stock setup.

      You should give the techs at Summit Racing a call. They can help find something for your specific application.

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