Leaking from head bolts

Having the same issues. First run of my motor and the coolant came out most of the header bolts. After doing some research, I learned the best way to install the header bolts is with the teflon thread sealant because of the bolts entering the water jackets. I put thread sealant on all of the header bolts and the bolts against the firewall still leaked. Turns out the BB header bolts I ordered from Jegs for my 383 were almost a 1/4" shorter than the originals I pulled out. That's when I removed and installed the original bolts which are a little longer, (thinking that the shorter ones do not fully seal the water jackets.) Anyway, three times a charm and I have now pulled the second from the back header bolts and done the same...hoping I have now seen the last of the coolant pouring out from my headers.