easy to build once youve doen a few, easycake, trick is to soak them in carb cleaner bucket overnight and rinse hot water and air compressor blow the out good, the air horn assembly and bowl assembly and throttle plate assembly.
then go to town on reassembly, getting choke right on auto choek housing models is the hardest part
meanwhile i have a very nice running 79 TH400 BB rochester Q jet for sale 40 plus ride,
good luck