Engine specification

the safari (as far as i can recall) is the same as the astro van but you have not specified if you have the 2.5L 4cyl or the 4.3L V6. also you didn't mention if it is a 4 speed auto or a 5 speed manual.

without this info it's be hard to tell you what you an do as there are way too many variables. but i can say the easiest thing to do is a 350ci chevy V8 swap since the V6 were simply shortened chevy V8's.

here are a few recall notices for this specific model of safari which you might want to get checked if you haven't already:

NHTSA Campaign ID Number: 91V164000
Recall Data: 09/20/1991
Components: SEAT BELTS:FRONT:ANCHORAGE
Units Affected: 4842
1989 GMC SAFARI SEAT BELTS:FRONT:ANCHORAGE
Recall Date: 09/20/1991

Summary:
SEAT BELT ANCHORAGE BAR FOR REAR SOFA FAILED TO SUSTAIN LOADS REQUIRED BY FMVSS 210.

Consequence:
VEHICLES WOULD NOT COMPLY WITH FMVSS 210.

Remedy:
REPLACE NONCOMPLYING SOFA BAR WITH BAR THAT MEETS REQUIREMENTS.

Potential Units Affected: 4842

NHTSA Campaign ID Number: 93V187000
Recall Data: 11/16/1993
Components: SEATS
Units Affected: 604207
1989 GMC SAFARI SEATS
Recall Date: 11/16/1993

Summary:
THE RECLINER MECHANISM AND THE SEAT FRAME MAY HAVE FOAM AND/OR VINYL BETWEEN THEM, CREATING A "SOFT" JOINT. THIS "SOFT" JOINT RESULTS IN LOWER THAN SPECIFIED BOLT TORQUE WHICH LEADS TO JOINT LOOSENESS, CAUSING BOLT FATIGUE AND EVENTUAL BOLT FAILURE.

Consequence:
IF BOLT FAILURE OCCURS TO THE DRIVER'S SEAT, IT WOULDALLOW THE SEAT BACK TO SUDDENLY RECLINE, AND COULD RESULT IN LOSS OF VEHICLECONTROL AND A VEHICLE CRASH WITHOUT PRIOR WARNING.

Remedy:
DEALERS WILL REMOVE THE FOAM AND/OR VINYL FROM BETWEEN THE RECLINER MECHANISM AND THE SEAT FRAME "SOFT" JOINT AND REPLACE THE RECLINER BOLTS.

Potential Units Affected: 604207

NHTSA Campaign ID Number: 06E043000
Recall Data: 05/19/2006
Components: FUEL SYSTEM, GASOLINE
Units Affected: 88303
1989 GMC SAFARI FUEL SYSTEM, GASOLINE
Recall Date: 05/19/2006

Summary:
CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURED FROM OCTOBER 18, 2005, THROUGH MARCH 21, 2006, SOLD FOR USE ON THE VEHICLES LISTED ABOVE AND ON CERTAIN SCHOOL BUSES. (TO SEE THE SCHOOL BUS ENGINE SIZES, CLICK ON "DOCUMENT SEARCH" AND THEN "BUS APPLICATIONS"). THE CONNECTOR ON THE FUEL FILTER WAS NOT MANUFACTURED TO HONEYWELL'S SPECIFICATION. AS A RESULT, THE O-RING MAY NOT SEAT CORRECTLY ON THE FUEL LINE.

Consequence:
THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. IN THE PRESENCE OF AN IGNITION SOURCE, A FIRE COULD OCCUR.

Remedy:
HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL IS EXPECTED TO BEGIN DURING MAY 2006. OWNERS MAY CONTACT FRAM CUSTOMER SERVICE AT 1-800-890-2075 (OPTION 1).

Potential Units Affected: 88303

NHTSA Campaign ID Number: 93V119000
Recall Data: 08/02/1993
Components: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTSISC:ROTOR
Units Affected: 341364