that head hole is 1/4". i bought a 1/4" to 1/8" plug, then a 1/8" to -4AN piece, then an oil supply line from ATPturbo.com. they also sell the suggested oil restrictor for my turbo. i dont know that your turbo needs, sorry.

Cougar is no more, parts for sale. Built escape 3.0 w/ 8.5:1 pistons, PnP heads, ovalport/mazda6 cams, SVT manifolds, the works entire car for sale PM me if you want a part!!!