you need a 3/8 x 18 NPT to -8 adaptor, and then a 45 degree -8 hose end

examples :

http://www.merlinmotorsport.co.uk/p2...duct_info.html

http://www.merlinmotorsport.co.uk/p2...duct_info.html

Don't forget, that the hose end MUST suit the hose you are buying - if the hose is Goodridge 200, buy a Goodridge hose end for the 200 series hose, not the 600 series hose, etc.