SOURCE: spark plug wiring
the firing oder is 1-8-4-3-6-5-7-2 at 4 degrees before top dead center\turn the crankshaft pulley to 4degrees, then the rotor should be pointing at the no.1 cylinder,
SOURCE: 1990 chevy 350 distributor wiring diagram and firing order
The firing order is 1-8-4-3-6-5-7-2.
The distributor rotates in a clockwise direction. The engine must be on the compression stroke on the #1 cylinder. Line up the timing marks. Remove the cap and the rotor should be pointing to approximately the 5 o'clock position.
Good Luck
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