FITMENT Fit for all 1955-1998 Small Block Chevy V8 Engines 265 283 305 307 327 350 383 400 (Will not work on Gen 2,3,4,5 Ls and Lt series engines.) and 350-455 Engines. FITMENT Fit for Small Block Ford V8 Engines 260 289 302 351W. (Will not work on 4.6L, 5.4L, and 5.0L Mod Engines). SIZE This bolts kit include 18ea 1/4x5/8” and 4ea 5/16x3/4” bolts. (Note: SBC engines do not need all bolts) MATERIAL Made of premium quality stamped steel with zinc plated at surface, these bolts are really solid pieces, rust and corrosion resistance. .
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