https://www.ebay.ca/itm/CHEVY-6-CYLI...RQ7xoN&vxp=mtr
I don't know how long this image will stay up but I think it is the right one. I got one from a junkyard many years ago and put it on a 68 short box. A few years ago I was looking to put one on my 66 and couldn't find one so had to modify one to fit.