Looks like they will according to Summit. THis is from the sites "application guide"
MakeCHEVROLET
ModelBLAZER
Beginning Year1973
Ending Year1991
Engine TypeV8Liter5.7CID350
Engine Size5.7L/350
Engine FamilyChevy small block Gen I
Engine SwapNo
Drivetrain4WD
Power SteeringYes
Power BrakesYes
Air ConditioningYes
Standard Transmission Column ShiftNo
Standard Transmission Floor ShiftNo
Automatic Transmission Column ShiftYes
Automatic Transmission Floor ShiftNo
Footnotes1 - Also available with A.I.R. injection manifold welded in place. Add suffix "S" to the part number when ordering (Not available with ceramic finish headers).
3 - Must modify stock exhaust to retain catalytic converters.
4 - Not legal for use on pollution controlled motor vehicles. Legal only for racing vehicles that will never be driven upon a highway. If you have any questions please contact your FLOWTECH dealer.
6 - Applications with oxygen sensor use reducer BIG-10105 for 2-1/2 in. 3-bolt flange or BIG-10110 for 3 in. 3-bolt flange.
21 - On 1983-84 4WD it is necessary to remove the rubber stopper below the starter.
23 - Installation requires Flowtech air conditioning bracket BIG-10042. 1979 and later vehicles equipped with short compressor, use original bracket.
58 - Will not fit angle plug heads.
