Fig. Fig. 49: 1988 238-all applications .
Fig. Fig. 50: 1988 318-all applications .
Fig. Fig. 51: 1988 360 light duty-Federal and Canada.
Fig. Fig. 52: 1988 360-California.
Fig. Fig. 53: 1988 360 heavy duty-Federal .
Fig. Fig. 54: 1988 360 heavy duty-Canada .IF YOU CANT SEE THESE REAL GOOD,GO TO AUTOZONE.COM,AT TOP RIGHT,CLICK ON BECOME A MEMBER,ITS FREE,ENTER INFO,THEN YOU ARE A MEMBER AND CAN USE THERE REPAIR GUIDES LIKE ME,ENTER YOUR VEHICLES INFO.,YEAR MAKE,MODEL,AND ENGINE THEN CLICK ON EMISSION CONTROLS,THEN CLICK ON VACUUM DIAGRAMS,YOU CAN INLARGE AND PRINT THEM,HOPE THIS HELPS YOU,IF NOT LET ME KNOW.
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the higher the number the higher the rpms 3:55 will burn more fuel. The 3:21 gets better gas mileage.
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