The 1405 carburetor is brand New, American mechanics are involved in supervising the manufacture. After the assembly is completed, test it with 289 engine to ensure that the carburetor sent to you can be used after installation. This is a 4-barrel carburetor. After ordering, you need to ensure that your engine has 4 barrels of mounting flanges. The carburetor is suitable for 5.0L 305Cu, 5.2L 5211CC 318Cu, 5.7L 350Cu, 5.8L 5753CC 351Cu and 5.9L 360Cu V8 engines from 1985 to 1990. Strictly speaking, the installation of carburetor requires experience. This carburetor is relatively complicated. It is recommended that you contact your mechanic first when replacing the carburetor, or you are a mechanic yourself. Then we trust you very much. Please keep in touch with us at any time through Amazon. Thank you! The package coming with below: 1. 1406 performer 600 Electric choke carburetor x 1 2. Step up road retainer spring x2 3. Spring x10 4. Metering jet x12 5.ROD retaining x2 6. Metering ROD x10 7. Oil-pipe x1 8. Carburetor cleaner brusher and needles x1 9. Oilfilter x1 10. Power corde x2 11. Some small parts for the installation