Each flange has a 2" long stub welded on the mating surface and stitch welded on the exterior for bolt clearance. 304 Stainless Welded Flange Kit: Ford 302/351W 1 5/8" Primary Stubs. The flange is then surfaced for a superior gasket seal.

Each flange has a 2" long stub welded on the mating surface and stitch welded on the exterior for bolt clearance. 304 Stainless Welded Flange Kit: Ford 302/351W 1 3/4" Primary Stubs. The flange is then surfaced for a superior gasket seal.