Wont Start, Help

To Gary in AZ thanks I will check again. I have been out of the game for awhile as I just retired from the Army and came home. What I did when I pulled the motor from the truck was to be certain everything went back exactly how it was when running in the truck. I pulled motor and then the heads and all the tin so I can reteach myself big blocks. Distributor was left in, I wanted the timing chain replace exactly as it was so I brought it up to #1 TDC and measured then replaced timing chain with a straight edge aligning it and yes the marks were exactly as the one I pulled. Then marked and pulled dist. and cleaned everything and bolted back together. Didn't even put a cam in it as I measured and calculated compression to be 7.6-1 and decided to keep the stock cam till I rebuild. I will retime everything to be sure.