[deezee]

To answer the original question, Ford block fittings are 1/4 NPT for the oil pressure switch. You'll need a 2 way adapter to take the 1/8 NPT that virtually all senders use. Something like this

http://cgi.ebay.co.uk/SIERRA-ESCORT-COSWORTH-TURBO-OIL-PRESSURE-GAUGE-ADAPTOR_W0QQitemZ400102311676