Hey everyone hoping to find some help. I have a 88 s10 blazer 4.3 and it cant even idle for very long without dying or me pressing on the gas to keep it alive, i also tried to take it on the road and i couldn't even go over 5 mph without it stalling out violently. the engine was a swap from a wrecked blazer that i had, I have swapped the iac, tps, icm, dizzy, etc. even set the timing, it is getting fuel. Any help would be greatly appreciated

thanks, Roland