As allready posted it is an early 3dr head. Considering you are fitting it to a pinto the thickness is not of great concern, as you will be needing custom pistons to run high compression anyway. Also remember the 3dr head uses small washer head bolts.

Lastly don't expect large gains from fitting the YB head to a pinto. It was designed as a turbo head and as such the ports are way to small for use in a N/A engine. Best results are found by opening up the inlet ports to 27mm, and exhaust ports to 26.5mm. With a suitable pair of cams and 12.0:1 C.R and engine spec to match you'll then see 200+bhp. If you leave the head standard you'll struggle to make 150bhp!