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Old Apr 16, 2013 | 01:14 PM
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What is a good spark plug to replace the AC R44T. This is on a 1972 LT-1 with 65,000 original miles driven in the city.
Thanks.
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Old Apr 16, 2013 | 01:37 PM
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The R44T is still available here

http://www.summitracing.com/parts/acf-r44t

Last edited by MelWff; Apr 16, 2013 at 01:44 PM.
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Old Apr 16, 2013 | 02:29 PM
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No reason to change from the r44t's. They've worked for me for the past 39 years in my '72. You can get them from Rockauto.com. Eight plugs cost about $13.00 with the shipping. Can't beat that!
Duane
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Old Apr 16, 2013 | 02:36 PM
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The letter 'T means tapered seat plug...therefore any 44 or 45T or TS will work just fine....the 'S means extended tip and the piston clearance is not a problem with those either other than ones with 11.1+ compression.....
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Old Apr 16, 2013 | 03:46 PM
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An extended tip plug would be my preference, especially if most driving is city. Extended tips have a wider heat range and resist fouling better.
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