Datsun Z car
GM V8 Conversion

Conversion of a Z car to V8 power is a very popular project. The conversion produces one of the most satisfying sports cars to drive, while retaining classic good looks.

The process involves installing the following:

• Engine mounts and engine
• Transmission and driveline
• Clutch release system
• Engine accessories: starter, alternator, belt and pulleys, and manifolds or headers
• Fuel system and distributor
• Cooling system: Radiator, fan, and hoses
• Fuel system and distributor
• Fuel Injection
• Exhaust

21st Century Hot Rods, has converted several Z cars. Our conversions are aimed at resonable cost, good street drivability and reliability. The V8 torque, a five speed and a 2200 to 2700 pound car are a fabulous combination.

Here are some tips to help install a GM small block engine, and a Borg Warner T5 5 speed transmision in a Datsun 240, 260, 280, or 280zx.



Mount the engine as far back as you can. Use a small distributor, either point type converted to breakerless, or an electronic advance unit form a late 1980's V8, Modify the hood latch so the distributor cap fits under it. On a 280zx the firewall should be curved back slightly

The transmission tunnel will need to be curved about one inch on the upper right, above the bell housing. The area by the clutch release lever will need substantial curving. Provide as much clearance here as you can, without interfering with the throttle pedal inside the car. Expect to have to put the engine in and out at least twice.

A camaro v8 5 speed transmission, bellhousing clutch and flywheel are easy to install, but not easy to get. A truck bell housing can be modified to accept a datsun clutch slave cylinder, and a Ford Mustang T5 transmission. While the Mustang v6 or 4 cyl transmission is not as tough as a GM v8 unit, and has less desirable gear ratios, they are rarely worn out, and are much less expensive. Using synthetic transmission oil and a stock or mildly modified V8 will give good service.

A Datsun pickup clutch slave cyl, and a 3/4" bore master cylinder are a good combination for the clutch relaese..

Use a starter from a 1996 suburban or similar. They save space and allow the exhaust pipe room.

The 280 Z's had EFI stock,and the fuel pump works well with GM throttle body injection An earlier car will need a fuel injection pump installed.

For a stock or mildly modified v8 engine, a 280 zx radiator is sufficient, assauming it's in good shape. Ford Tarus electric fan, or a Dodge caravan twin fan works well and fits nicely



Late 80's V8 engines used a serpentine belt. This works well, but the tensioner must be moved if accessories are not used, such as A/C or power steering.

We highly recommend GM throttle body fuel injection over carburation. The installation is fairly simple, and the smooth power, cold idle, and ease of starting are very nice. If you have a preformance cam in the V8 you will need an EPROM tuned to match.

The exhaust manifolds from an 80's Chevy pickup work without modification on the driver's side. The outlet on the passenger side can be relocated to the center of the manifold with some cutting and welding by a skilled fabricator. Alternately, "Block Hugger Shoty" headers, or "ram horn" center dump manifolds machined to be closer to the block, work well too.



A custom driveline will have to be made. Most driveline shops have all the parts needed if you provide a GM driveline.

The exhaust mainfold is very cose to the wiring on the passenger side. A sheet steel heat shield should be screwed to the body to protect the wiring and brake lines there.