87 chevy 350 tbi HELP

[Mrdsmoke420]

my 87 truck will not start.. the tbi injectors dribble out a little fuel and sometimes it will start but will not run to long because of it is not getting fuel. i replaced the fuel injectors thinking it was them that was wrong. the left side dribbles out, the right side will not. i have even rebuilt the tbi thinking it needed some cleaning.. same thing happens though. what could be my problem? also, the engine in the 87 was replaced with a 93 i think. not to sure on what year the engine that is in it is or what it came out of.any help is greatly appreciated.