I have one of these Fuji Absolutes. Came with standard Japanese parts, nothing special. Bottom bracket spindle has the "scew on" nut configuration, rather than the "screw in" bolt type such as Campy uses. Tange Levin headset. As for the seatpost size, not sure on that but be aware there are a number of different seat post sizes, they are definitely not all "1 inch". Valite #1 tubing, which I assume means straight guage (not butted). For wheels, you probably need a standard 27" dished to accept a 5 or 6 speed rear freewheel, using the existing 120 or 126mm spacing between the rear drop outs. They are commonly sold on ebay, may have to be patient and wait for some to come up. If you want to go with the slightly smaller 700c rims, there is a lot more choice, but you will then need to make sure that that brakes you have (or get) will reach down far enough to engage the pads with the braking surface of the rim (ie, you probably would need "long reach" brake calipers). Lots of things to think about when outfitting an older frame! Good luck.