spark plugs
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: spark plugs
ACDelco is a safe bet.
GD
GD
Junior Member
Joined: Sep 2013
Posts: 24
Likes: 0
From: Mesa ,AZ
Car: 1989 RS Black Vert
Engine: 305 TBI
Transmission: Auto
Axle/Gears: 2:7some thing
Re: spark plugs
If you have an owners manual look in there it will give you the name and the number of plug you should use in your car Chevrolet has spent thousands of dollars to figure this stuff out I would bleave they have done all the research and have the right information
Junior Member
Joined: Nov 2009
Posts: 40
Likes: 0
From: Bryan, Texas
Car: 83 Pontiac Trans AM
Engine: 305 CFI
Transmission: 700R4
Joined: Aug 2009
Posts: 1,972
Likes: 127
From: Los Angeles
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: spark plugs
Assuming stock, OEM Delcos are a safe bet. But if your car is running correctly, NGK Iridiums will give you about twice as long between changes, they do seem to foul more easily if the car isn't running well.
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