For a low cost fuel pressure setup I used an older oil pressure gauge.(after market underdash style)I am sure you must have an old one of those around, or can pick up one cheap at the autowreckers. Hopefully in 5psi incriments or close to that. Then take it to the auto store and ask for some 1/4 plastic air line, 6ft or so(used in larger truck brake system) and some compression fittings to connect to gauge. I am not sure if the Monty has push on hoses or not but you need to some how "T" into the supply to the rail anywhere between the pump and the injectors. The brass parts for the connections may cost you a little now but you will have one for ever and it won't cost $300 like the professional ones. <img src="/forums/images/graemlins/cheers.gif" alt="" />