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The 403 is an Oldsmobile small block engine (1977-1979) and this plate is designed specifically for it
350 V8 (1968-1979)
Condition: Brand new in unopened package
CNC Machined from 6061-T6 Aircraft Aluminum with machine polished finish
The 390 was the everyday workhorse of the FE family
Fuel Pump Block Off Plate Fits 1970 Buick 455 GS Stage 1 Engines 6061 USA 1967 Buick The 403 is an OldsmobileFuel Pump Block Off Plate fits 1970 Buick 455 GS Stage 1 Engines CNC From 6061 Billet Aluminum Made in the USA Our fuel pump block off plate is a must have to cover the mounting hole and prevent oil leaks in your engine when upgrading your fuel system from the stock mechanical fuel pump to a more reliable electric fuel pump. This high quality block off plate is a perfect fit for your 1970 Buick 455 GS Stage 1 engines. These are precisely CNC machined