- Jan 31, 2005
- Reaction score
cadillac512 said:bamabob said:How about rerouting the coolant flow for the heater. Can I put a freeze plug in the head and pick up water elsewhere?
Yes. I suggest drilling the block just below the thermostat on the right hand side. Tap it to either 3/8" pipe or 1/2" pipe and install a heater hose nipple. That's where the '70 engines ran the heater supply hose and it works well. The 425 may even have a flat surface there like the later 472/500 engines do.
I just checked one of your pics and your 425 may already be drilled and plugged there....is it?
http://rides.webshots.com/photo/1490854 ... 6353EbuNAY
Terry, you are right. There is a tapped and plugged outlet there. Looks like 3/8". Thanks for taking the time to research this and reply. Also thanks for the compliments on my car.