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| | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
What are the sises of the holes in your block?
I think the by-pass filter lines were 1/8" NPT; and. I think the 1957 261s should have a by-pass oil filter. The 1958-1962 261 full-flow filer lines are 1/2" NPT.
When you say 5/8" lines, what are you measuring?
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