after sitting for 5 hours my car went from running great to running terrible

Didnt see that comin. You know theres just TWO reasons for that, right? lol. Nice work.
I thought that engine was coming out? You know it has to come out right. Thats the only way youre gonna get the crank journals cleaned out. And the galleries. And the oil supplies to the cam,rocker shafts, etc.Unless youre just gonna run er into the ground for the fun of it.