Ok I have a weird one. I have a carb that I does not seem exsist. It does not seem to fit into the nice neat easy to figure out catagory. According to Dorian Yeagers web site http://www.dorianyeager.com/qjetdecode.html the carb is a mid 76. The casting number do not make a lot of sense and don't fit exactly into how dorian site say's they should. I spent over an hour at Auto Zone going through their books. I think I found the right rebuild kit. I found carbs one digit either side of this on (last diget of casting before and after). What I need to know is what this pig was bolted too so I can get an idea if the main jets are going to be too big for my 350 and I need to swap from the old carb. Here on the numbers 17062040 1896 What is throwing me is the 6 as the 4th digit. Also this thing is filthy and I may have put a 2 as the fifth digit and it's supose to be a 7.