just got my car back together from a head job and now it wond start.

i had replaced both of my heads on my blazer and now it wont start. i torked the rocker arms to 20 foot pounds but in no order or any thing i just went at it. the motor has fuel and spark and the fireing order is right so throw out some ideas

 

Does it rotate and not start, or nothing at all?

 

it rolls over strung but no start

 

According to GM Service CD valve rocker arms should be 18lbft of torque... and the ball stud at 35lbft... also check all your electrical connections to make sure that they are tight and working...also make sure the computer connections at the computer are tight.