If you don't want to try & drive the pin in you might be able to tap & plug the vertical main oil galley to do full flow filter.
This is what I did to use a spin on full flow on my 261, replaced canister w/ spin on filter. Had hoses made @ local NAPA, uses a fur* filter (NAPA 1068).
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Last edited by BC59; 12/11/2025 4:02 AM.
BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022