The fuel rail adapter for checking fuel pressure is available from parts houses like PepBoys, but it must be ordered from the manufacturer. At one time I had the manufacturer's name and crossover part #, but now can't find it. You might check with NAPA or PepBoys.

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum