Found a picture of a Worn Cam from a 292. I know this sounds like a weird link but I checked it and got the photo
http://www.employees.org/~devo/65chevy/292rebuild/100_0199.jpg

If you want to see the whole rebuild this page has photos. The pics are big so it is slow to load on Dial-up. The photos look like 200 x 300 size but if you click Properties and copy the picture address... you can open it in another Tab and it is 1280 x 800 pictures. Here is the link http://www.employees.org/~devo/65chevy/new.motor.html

250 Integrated Head / 1981 C-10 Pick up.