JACER Enterprises F147-OS31 - Oldsmobile 350 Fuel Pump Block Off with Bolts Fits all year Big Block Oldsmobile engines equipped with factory style timing cover CNC Machined from  thick 6061 T6 Aircraft Grade Aluminum Includes 2 - Stainless Steel 5/16-18 x 3/4" Long SHCS Fasteners Highly Polished and Lightweight 100% Designed and Made in the USA