I have the 12 A/N cooler from Olthoff racing with the 12 A/N lines that was feeding through a # 10 Canton A/N filter adapter. When I found out that Beaumont Metals was making a # 12 adapter I jumped on it right away to achieve much better
oil flow.
It's a work of art but a very cumbersome job to intall in a 351 W as the clearances are very thin. I used a old ford wrench and cut of part of the handle to get to the nut as nothing else in the garage would fit the tight area. ALSO the 12 a/n connectors are PORT connectors using O rings that mount onto the adaptor so be sure to order two of these as well. I didn't get the bi-pass valve because it's always sunny in California.
Glenn