Reverse Cooling/ELC. waterpump

[ckrell]

Recently I've bought A davidscraig water pump and was wondering if theres any need to plug any holes in the deck or head for reverse cooling? I'm assuming that on reverse cooling the water goes in were the thermostat was ( the back ) and comes out where the water pump was. On the block at the water pump mounting area theres a odd shaped triangle hole to the left and a apx .250'' hole on top and a apx .875'' to the right, what holes are actually needed for exiting the water from the block?

 

[TexasTurbo]

Wait what is this snake oil? Reverse cooling? What does that do?

 

[ckrell]

twick69 is using this technique on a 7 bolt. I have a 6 bolt but also interested in the details about this modification