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Old Apr 19, 2017 | 11:52 AM
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Default flat tappet
PO installed a crate '82 350 that originally came from a pick up, added a mildly upgraded cam. Time for an oil change. Are all 82 350's flat tappet? Or is there an easy way to tell?
Thanks as always
Last edited by Capt Ken; Apr 19, 2017 at 11:52 AM.
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Old Apr 19, 2017 | 12:06 PM
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yes it is a flat tappet, roller didnt start till Gen II small block 92 (Correction it started in 1987 in Gen I)
Last edited by MelWff; Apr 19, 2017 at 03:41 PM.
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Old Apr 19, 2017 | 12:58 PM
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Default Gen II
Thanks! Reading your answer, assume Gen II first rolled out in 1992?
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Old Apr 19, 2017 | 03:21 PM
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The upgraded cam could have been a roller one though? No easy way to tell from the outside unless maybe the cam chain cover has been upgraded for adjusting roller cam end float.
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Old Apr 19, 2017 | 03:28 PM
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I would add rollers began 1987 in cars, 96 in trucks.
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Old Apr 19, 2017 | 08:33 PM
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If you want to be sure, pop a rocker arm off and pull the push rod out. The roller cam rod is shorter.
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Old Apr 20, 2017 | 06:44 AM
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a stock flat tappet rod is 7.8 inches
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Old Apr 20, 2017 | 08:46 AM
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366277 1010 steel 5/16" 7.824" Flat tappet (1) Heavy-duty heat-treated .075" wall, hardened tip inserts. +.100 long


14044874 1010 steel 5/16" 7.724" Flat tappet (1) Heavy-duty heat-treated .075" wall, hardened tip inserts; standard length


Straight from the Chevrolet Performance Parts catalog.
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Old Apr 20, 2017 | 03:19 PM
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Just use flat tapet compatible oil and your good to go.
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Old Apr 21, 2017 | 10:33 AM
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Originally Posted by jim2527
Just use flat tapet compatible oil and your good to go.
mobil one 15w50 is high in both phospahate and zinc, both are 1300 ppm. Mobil one has a chart on their website and its alot cheaper than the racing oil and easier to find. 5gallon jugs at wallyworld are $25 bucks
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Old Apr 21, 2017 | 01:29 PM
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Living in a part of the country that gets a little cold in spring and fall and at times can get really hot in the summer, I use Castrol Edge 5W50 Full Synthetic Motor Oil. ZDDP of 1250 ppm.
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