are you going to balance the motor? was watching a car show called gasolene last night, anyway, the guy was rebuilding an old classic V8 and he was weighing every piston and every conrod, bearing etc then showed the correct way to bore a block which is very scientific indeed then he span the crank on a machine ,
i think that was great to see and if i do a rebuild in future i will defintely look into having that done,
so i agree with birds, dont just get parts and slap it together, take your time and get things right, cause the end result will be a nice engine with a long life.....
research and make sure you use a good engine rebuilder to to the crucial parts...