Hey guys. I recently made some changes to my 83' K10 350, and now she won't start. When cranked, it will try to fire and very occasionally barely run for less than a second and then die. It sounds like it is only firing on a couple of cylinders. It doesnt backfire either. The only changes I made were rebuilt my carb, and swapped out the intake for a stock aluminum one from a 350. I'm sure it's not a timing problem, I have checked it a million times. The distributor looks to be in good shape. I borrowed a friends carb and it does the same thing, so it's not the carb. I originally suspected a vac. leak, but can't use the ether trick without it running. Any thoughts would be appreciated as I have been working on this for weeks.