Fittings into the gearbox:
18mm x 1.5 o-ring
16mm x 1.5 o-ring
I believe the larger one is the pressure side
If you’re looking for adapter fittings to AN sizing see the links below:
Russell 648060
https://www.summitracing.com/parts/rus-648060
Russel 648080
https://www.summitracing.com/parts/rus-648080
If you need hose to make the connections yourself, be sure to use THIS HOSE ONLY. Using other braided hoses is not recommended due to the pressure spikes in the PS system. This hose below has a teflon liner and supports up to 2,500PSI
Edelbrock / Russell 632620 -6 AN PowerFlex Power Steering Hose – 10 Feet
https://www.amazon.com/gp/product/B000CPJHWA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
For LSX swap applications, I used this to fit into the pressure port of the LS2 GTO power steering pump
Russell 670840 AN Port Adapter Fitting (-6 o-ring to -6 supposedly listed)
https://www.amazon.com/gp/product/B0014B7X5Y/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
