The diagram may be available by an online search. If not, then look an a service manual, available in some library's or any auto parts.
autozone.com
printable diagram for firing order for 1980 trans am turbo 301 4.9 engine
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images.google.com ? you might want to try Vacuum diagram, and then Intake diagram. Depending on what exactly you're looking for.
I own a 1989 Sunbird GT turbo and the vacuume line diagram is located under the hood on the top left corner.
A vacuum hose diagram, for your Subaru, can be obtained from most Subaru dealerships. The vacuum line diagram can also be obtained from most auto-parts stores.
You can find a vacuum diagram for your 1987 2.4 liter nonturbo engine in most service manuals. The service manuals can be found at your local library.
When you get ready to run the vacuum line from the turbo 400 trans modulator to an Edlebrock Performer 800 CFM carb, attach the vacuum line for the transmission vacuum modulator to the bottom constant vacuum source or the plug that is below the throttle plate. After that, install the vacuum advance to the port that is signaled or right above the throttle plate. Once that is completed, install the large vacuum line to the back of the carb for the power brake.
yes check you vacum line in the back of your transmison
A Chilton's Automotive Repair manual will have a diagram for the vacuum lines for the 1988 Supra Turbo. This is an inexpensive manual when compared to the labor costs. It is about $25 at most automotive parts stores.
the only thing different would the internals of the trans the turbo trans is a heavy duty trans.