4.3 turning over but no start

[Gazjen]

Right I have finally rebuilt my engine I'm trying to get it to run on my garage floor.

its turning over ok, I've got fuel and spark is there but it seems erratic and when i've got my timing strobe on, it missis every so oftern. I've set the ignition timing to No.1 on the mark on the front pulley. But it still doesn't seem to want to fire. I got small flames coming out the exhaust so it seems like an ignition timing fault. Any Ideas? I was so excitied about finally getting it running today but maybe not

[seapuppy]

yeah..timing....

SP

[SilveradoSS]

Have you checked to be sure the distributer is in correctly? Along with that are you sure the wires are in the correct order. I had a rebuild once that I was off by one and had the same results you are describing.