I'd like to pick this conversation back up again so I can have all the info I need when the time comes. Seems there was still some open questions and issues here to figure out.
Quote from cerberus60 Actually, I was doing a little research and that will work relatively easily into a 99.
The easy way is to get a 98 12V harness and a front damper with a tone ring and your golden for the electrics. The 98-00 trucks have a crank and cam sensor and all you need is the crank sensor for the tach. The cam sensor is used only for the IP and the 98 harness would remove that.
The 01-02 only had a cam sensor to run everything so you had to use the relocation bracket and a 24v cam gear for the p-pump conversion to get the tach to work. You can make the 24V harness work with some fooling around but you have to remove the CEL bulb as it won't like the absence of the cam sensor and pump connection.
What I have found reccomends getting a 98 12V harness if you can and selling the 24V harness and motor to offset the cost of th enew harness. The other thing that is not clear is exactly when you need to worry about sensors being metric and SAE. You may have to get the 98 sensors to thread into the block or adapt if they need different voltages, but, some have said if its a 99 there isn't a problem.
Do you have an auto or manual? Auto will take some more work as you will need a TPS to replace the APPS signal for trans control.
cerberus60
"It's an NV4500 Truck"
That simplifies things, no TPS to worry about.
I **think** you will need the tone ring off the 24V on the damper or get a 98 damper. Still trying to get some answers on that.
If somebody on here has a 98 12V or you know one someone, could look at the damper and see if it has a tone ring instead of the older notch in the damper setup?