If you wanted to fit one to a Cortina Gt I could talk you thru the process and give you a parts list from memory.....
However, not much help!
In principle it involves either replacing the pressure switch with a transducer or installing a T adaptor so you keep the light and have a guage also. I would steer clear of a pressure line type as the impulse line would have a long tortuous path, and if it splits you get sprayed with hot oil! A piezzo transducer and suitable gauge is best option.
How about finding a firm that specialises in prepping K series for competition: Demon Tweeks or similar. Once you have the correct transducer it would be a simple wiring and fit,ting job.
Apologies if I have stated the obvious - I'm sure you've already worked this out.
It will be all right in the end. If it isn't all right yet, then it is not yet the end..
