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- Wed Aug 15, 2012 9:28 pm
- Forum: General Motors
- Topic: 454 Timing Question Using TunerPro
- Replies: 3
- Views: 10095
Hope I'm not too late.... I couldn't time my old '79 P30 motorhome either but just by chance one day I was looking around under the engine and found the lower timing tab.I'm guessing it's used because it's impossible to even see the front of the engine(454)to access the normal tab.That timing tab is...