Want the same ease of checking your fuel pressure that the TPI guys have? Mercury Marine sells a fitting that screws into the back of your TBI and then the fuel line screws right into the adapter. It has a Schrader valve in it so you can plug that fuel pressure tester right in and check where you are at. You can get it online at www.mercurymarine.com under parts express/parts for mercury marine engines. The part # for it is 91-806901 and it costs about $25. Let me know if you purchase this and what you think of it.

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'89 305 Formula TBI. Hedman Shortie headers, Flowmaster 80 series muffler, Jet Stage II chip, 160 thermo, Jet underdrive pulley set, Edelbrock TBI intake, 1/2" TBI spacer, Injector spacer,adjustable fuel regulator, flow matched injectors, Edelbrock TBI strut tower brace, Hotchkis panhard bar, lower control arms, subframe connectors, Bilstein shocks,MSD ignition, Edlebrock 14" open element air cleaner with K&N filter and K&N filtercharger, Auburn 3:73 Posi with Richmond gears

 

I don't see any pictures/good description on the site... Not enough data to make a decision.

EDIT: Just run one of those pressure gage adapters for carbs they have in Jeg's/Summit. Basically has 3/8" input/output with a 1/8NPT port to put a fuel pressure gage. It will always be working. Get a 0-15psi gage or a 0-30 gage if you have more than 15psi.

[This message has been edited by FastBroker (edited March 27, 2001).]