Vintage Hilborn stack injection for small block chevy. I picked it up years ago from a California racer. The stack were unwrapped for the first time by me. The intake looks like it may have been used once and lightly at that. One stack has a small ding in it from being hauled around in boxes in my move. Here are the nubers: Nozzles - 7A Throttle opening - 1 13/16" Top of intake - 2175 under intake - 265-C-8C 1963 Vintage Comes with NOS Hilborn fuel filter (F500-2A), extra lines, linkage, Hilborn cam-driven fuel pump ("O" sized and clearanced for balancer), and brand new Enderle timing cover with new crank seal .