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Classifieds Rating: (3). Re: How to time HEI & carb 1999 Vortec 350. You need to get a timing tab that has numbers and replace the one on the motor OR you can get an adjustable timing light, set your base timing (say 10*) and then mark it up with the current timing tab.ow to time HEI & carb 1999 Vortec 350. I swapped a 1999 vortec 5.7 into my 92' camaro. My question is How the heck do i time this thing. I ditched the computer/ Fuel injection for a carb. I have the plastic vortec timing cover and the vortec 8 balancer.
The cam gear and the crank gear will have a mark on it. Bump the engine until the cam and crank marks are together (crank mark up and cam mark down). Then install the distributor so that the rotor is pointing to fire plug #1.This will be TDC. You may have to put a long screwdriver down the distributor hole to line up the slot on the oil pump rod with the pin in the bottom of the distributor.I don't know of an easier way of doing it.Addition: After you have the distributor back in, the water pump and timing cover sealed up, put the balancer back on.Then yes you will have to fire the engine to set the timing. It's few hours worth of work to do this, but it's the only way I know.ddition: After you have the distributor back in, the water pump and timing cover sealed up, put the balancer back on. Then yes you will have to fire the engine to set the timing. It's few hours worth of work to do this, but it's the only way I know.