One more note. I have a 1973 service manual. It shows the the lift for cam pn 3848000 (292 cam) is .405 and the compression is 8.0:1.
Also, the manual shows the stroke at 4.12 not 4.120. The 1965 gm truck document shows the stroke @ 4 1/8, which of course converts to 4.125. So GMs own documents have conflicting information.
