this truck is killing me!

[ol'blazer]

so i did a mild build on the 350 for my truck.. after dropping it in and doing the timing ect. the block heater blew out the side, i shut it down right away, no chance of over heating. after putting in a new block heater the truck started blowing antifreeze out my right tailpipe... turns out my right head is cracked... now i need a set of heads these where nice 64cc chamber heads to, know all i have to replace them with 76cc heads.. sorry i had to vet, this build just has me down today..