Timing Mark
Elder User
Joined: Feb 2005
Posts: 693
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From: Hoboken, NJ...
First I would get the flywheel all cleaned up nice, so you can read all the markings on it. It should show TDC and grads of 5*. You would use the pointer on the block to reference the degree markings on the flywheel. The stock base timing with the SPOUT out is 10* BTDC.
The truck should be warmed up first......then remove the SPOUT plug/connector. Loosen the dizzy retainer bolt. Connect the timing light to cyl#1, and set to 10*BTDC . re-tighten the dizzy, and recheck the timing.
Some guys here who have done a bit of engine mods set the timing to 13* or even 14* BTDC
The truck should be warmed up first......then remove the SPOUT plug/connector. Loosen the dizzy retainer bolt. Connect the timing light to cyl#1, and set to 10*BTDC . re-tighten the dizzy, and recheck the timing.
Some guys here who have done a bit of engine mods set the timing to 13* or even 14* BTDC
Elder User
Joined: Mar 2004
Posts: 506
Likes: 0
From: Buffalo, NY
madmader, check this site, it will tell you all the info you need for your 79:
http://home.earthlink.net/~bubbaf250/index.html
http://home.earthlink.net/~bubbaf250/index.html
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