I know there are formulas that tell you which speedometer drive and driven gear you need depending on differential ratios, tire size, etc. Regardless of these facts, which direction should one take to increase the speedo cable speed? For example, if my speedo reads 40 MPH and I am actually...

Can someone tell me the correct heater hose routing on a 1977 F100 with a 302 engine? There are two outlets on the thermostat housing (one on the top and one on the front) and two on the side of the water pump. Which ones go to the heater and which one of these should have the normally closed...