Oil Filter adapter issue
Okay, so another riddle. 1965 C20 with a stock 283. I am looking for an oil filter adapter to convert to a spin on. I bought a transdapt adaptor 1024 that didn't fit. Then I went to NAPA and bought a Mr. Gasket that didn't fit. Both kits came with bolts that were to small to mount to the block. Pics attached are the block and the part I removed. To the left is the stock bolt ( the larger one)and then the one they supplied. Any ideas?
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