Sorry it has taken so long to post pictures of a spin-on filter adapter on a 1960 261 engine. This engine had the optional full-flow canister oil filter and has been adapted for a remote full-flow spin-on filter.
This is the spin-on oil filter assembly attached to the firewall:
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http://home.nycap.rr.com/lederman/images/OilFilter2.jpg[/img]
You can almost see where the lines connect to the block:
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http://home.nycap.rr.com/lederman/images/OilFilter1.jpg[/img]
By the way, a set-up like this is available (with lines and fittings) from Pep Boys for around $25. However, the brass adapter on the oulet of the filter head has a fitting for the oil pressure gauge - this adapter came with the factory oil filter.
Tim