Thanks to all.

Stuart: My guess is that over the years my truck has had electrical and wiring work done to it. The fuse block is labeled with duck tape. when I bought the truck it had a 350 engine. I am putting back in a 235. The truck also has some under dash gauges, so there is wiring for them. I plan to use the original dash gauges.

Question: In taking your approach would you pull out everything and start from scratch using the manual and wiring diagram? Or would you take one wire, trace its path, dermine if it is original and replace accoding to manual and diagram?

Thanks in advance.

Bob