The wont start

I have a chevrolet s10 6 cldrs I just did swap the engine but it wont start I did change everyting from the old engine the thing is the old engine was running good but was burnnig oil and was making some kind of noise but the fuel pump the distributor and everything was working good and on the other engine were broken so I swich those parts but I tink I mmade a mistaque when I swich the distributor because the one came with the other engine was broken so took it of before I put the engine in the car and then I put the engine in the car. When I was ready to located those bolts to hold the flyweel and the tranny converter I muve the puley of the engine so afther that I put the distributor in, and when it was everything already conected I tryed to started it wont what sould I do