I was just poking my finger into the long block that was 1/2 filled..(Johns) I disassembled the the thing. His race car is fully filled neither had any temp issues in driving around the streets i know that, i would shoot him a PM....its definitely not no walk in the park and i was discouraged from doing it to mine with the Goal of 650 wheel and a 62 series Precision come spring ...maybe your goals will call for a 1/2 fill though PM or text him