The wiring clip brackets are reproduced. There are seperate left and right side ones. Our host, PY has them. Part #RPE234. Youll need two pairs.
The two temp senders are completely different units. The single prong drivers side piece is the sender for the gauge. The passenger side rear unit is for the ECS emissions system and has three prongs. Maybe someone can chime in on the part numbers. But a word of caution, the modern Delco single prong sender is calibrated wrong and will show your car to be runnng 20 degrees hotter than it actually is. Here's some helpful links on prior discussions:
http://forums.maxperformanceinc.com/...ht=Temp+sender
http://forums.maxperformanceinc.com/...ht=Temp+sender
My car has the fixed position 80 amp alternator, so my part numbers wont correspond to a car with the regular adjustable alternator set up. The alt belt was 50 inches and the ps belt was 49 inches long. Go to rockauto.com and punch in your application and go from there. Do you have any belts on your car now? If you dont have belts, grab a fabric tape measure the kind "the wife" uses for measuring her waistline and wrap it around the belt route. It will give you a rough estimate. The main thing to remember is to get belts of the same width, from the same manufacturer.
BTW, if you want about 81 pages more of tips, go here for the prior 1972 project. If I recall (after 8 years of posting on it) there is a discussion and photos of the two senders in there.
http://forums.maxperformanceinc.com/...433662&page=81