if your taken the block apart I would just sleeve the block and do rods and pistons. With 5k and you doing it yourself you can pretty much build you’re motor on that budget. Block guard will only protect your head which we need but not as much as we need it on our blocks. If you do a little more reading and "homework" you'll fund it to be thEE safety route and after that you'll be running waaaay faster then low 13's that’s for sure and safe which is my number 1 priority before speed.