Check the listing for details. Dual quad 2x4 progressive linkage kit for 1850 style Holley carbs. Condition: New. Listed at 69.95 USD. First off, let me say, I don't know why ebay's numbers are so far off, but I don't have 316 kits for sale. I only have about 50 left. Also the number sold should be somewhere around 250 and not 13, as I am on my 3rd run of 100 kits per run. When I get close to running out I will make another run if needed. What you will get: Dual quad 2x4 progressive linkage for 1850 style Holley carbs, but may work on others too.. These are designed in a way that you will have the large hole on both carbs for throttle and transmission kick down linkage or whatever you need them for. Included in the kit will be: 1 Main mounting bracket1 Fulcrum2 10-32 x 5 Stainless Steel Throttle rods 4 10-32 Round clevis1 Large nylon washer2 Medium nylon washers2 Small nylon washers2 10-32 stainless steel nuts6 1/4 Stainless steel flat washers1 1/4-28 x 3/4 Hex grade 8 bolt1 1/4-28 Lock nut4 Hairpin clipsDetail sheet with pictures and instructions These have been yellow zinc plated so they will look good installed on your engine. I have a set on my own 454 and it works great. The pictures are from my own engine. If you have a tunnel ram intake you will need one longer throttle rod, so let me know when you order and I'll make the switch to the longer rod. Thanks, Jerry