Classic Muscle Car and Truck Mechanical Service in Maine

We are the mechanical half of your restoration. Portland Performance handles engines, transmissions, drivelines, wiring, suspension, EFI conversions and tuning on classic cars and trucks, done right the first time by people who build and calibrate engines for a living.

Owners bring us cars from all over New England, including Massachusetts, New Hampshire, Vermont, Connecticut and Rhode Island, often to sort out mechanical work another shop left behind.

Request Classic Service Call (207) 517-5555 Send Us a Message

Indoor and secure while hereHolley dealerWinter projects welcomeOwners from across New England

Yellow second generation Camaro with the hood up for classic service at Portland Performance in Lewiston, Maine

Winter is the best time to book your classic

Your car is parked for the season anyway, so let it spend that time with us instead. It stays indoors and secure the entire time it is here, and it comes back ready to drive in the spring.

Small jobs: tune ups, carburetor or EFI tuning, ignition, brakes, fluid service and the list of nagging issues from last season
Large projects: engine and transmission work, EFI conversions, rewiring, suspension and driveline upgrades

Winter storage discount for classics: Classic cars and classic trucks stored with us while we work on them this winter earn discounted heated storage. The more work we do, the less you pay, and major builds store free. See winter storage or ask us for details with your estimate.

Call early to get your car on the winter schedule.

Book a Winter Project

What we do for classics

Freshly rebuilt orange big block engine ready for install

Engines and builds

Engine repair, rebuilds and complete builds, from stock rebuilds to performance combinations, assembled and broken in properly.

Technician calibrating a classic car EFI system from the driver seat

EFI conversions and calibration

Holley and FiTech EFI installs, wiring and custom calibration, plus dyno tuning. We are a Holley dealer and calibration is our specialty.

Classic small block engine bay with MSD ignition

Carburetors and ignition

Carburetor rebuilds and tuning, distributor rebuilds and curving, and ignition upgrades.

Transmissions and drivelines: automatic and manual service, swaps, rear ends and driveshafts
Electrical: diagnosis, repair and rewiring
Suspension, steering and brakes: repair, rebuilds and upgrades
Diagnostics: running, starting, overheating and drivability problems
Maintenance: keeping finished cars reliable season after season
Corrections: fixing mechanical work from other builders

From our shop floor

Plymouth Sport Satellite and Camaro Z28 in the shop at Portland Performance — Sport Satellite, with a Z28 on the lift

1956 Chevy Nomad with an LS engine swap — 1956 Nomad with an LS swap

Pontiac GTO in for classic muscle car mechanical service — Pontiac GTO in for service

Light blue classic Ford Bronco with the hood open at Portland Performance in Lewiston, Maine — Classic Ford Bronco

Chevrolet Chevelle on the dyno during engine calibration at Portland Performance — Chevelle on the dyno

Why classic owners trust us

Built by a calibrator

Our owner is a professional motorsports engine calibrator and Holley expert. The same approach goes into every classic: find the real cause, then get the combination running right.

Safe indoor space

Your car stays indoors and secure the whole time it is with us, from a weekend job to a winter long project. That is rare for a mechanical shop.

We stay in our lane

We handle the mechanical, electrical and integration side, from wiring to EFI and engine calibration, so the car is actually fun to own and drive and as reliable as it can be. Bring us your car from your paint and body shop, or before it goes there, so everything under the skin matches the quality of the finish.

Holley and FiTech EFI specialists

We are a Holley dealer and work with Holley and FiTech systems every day, from installs and wiring to custom calibration, so your EFI conversion runs right instead of living on a base map.

Classic service FAQ

Do you do paint, bodywork or frame off restorations?

No. We focus on the mechanical side: engine, transmission, driveline, electrical, suspension, EFI and tuning. We are happy to work alongside your paint and body shop.

Which EFI systems do you install and tune?

We are a Holley dealer and work with Holley and FiTech systems, including custom calibration.

Do you tune modern street cars?

Custom calibration and dyno tuning are only offered for classics and competition vehicles. See Tuning and Dyno.

I am out of state. Is it worth the trip?

Many of our classic customers come from elsewhere in New England. Call us to talk through your car before you make the drive.

Talk to us about your classic

Portland Performance, 1830 Lisbon St, Lewiston, ME 04240. Monday to Friday, 8:00 AM to 12:30 PM and 1:30 PM to 5:00 PM (closed for lunch 12:30 to 1:30).