Hi, I just installed the heads on my 99 ls1 and it was my first time doing it,but I forgot to draw a line on the head bolts to torque it down correctly and to line them up to the correct torque,but i torqued them down really tight,but I don't know if it's okay or do i need to go back and re do them. Also if i need to go back can i use the brand new bolts that i alreadied install or do i need to buy them again for the retorque since gm head bolts come with loctite on them? Please help!!!

 

That's nothing to play around with. GM head bolts are torque to yield bolts. You need a torque angle guage. Get some new bolts and do it right.