I don't know how many threads I have looked at for the above but I do know none of them had an answer to my particular question.

Now I have checked the length with my pushrod checker. Got 11 that are in the 9.45-9.46" range and 5 in the 9.47-9.48" range. The question deals with what the range of motion there is in a hydraulic lifter. My measurement was obviously done in the car and the lifters are fully pumped up. Given the block rebuild, head rebuild and valve job done nothing can be assumed as I have learned.

For range of motion I have seen 0.100" mentioned a few times. Is that a valid number? If so then I assume I want to be centered in the middle of that range. Then that means I have lengths of 11@ 9.50-9.51" and 5@ 9.52-9.53". Definitely shorter than the standard 9.59" back in the days but I doubt it would be anywhere near the standard 9.59" anyway.

So is my thinking and calculations correct?

 

I believe that you're looking for .050 - .150 with the lifter bottomed out. I used channelocks to collapse lifter, then set the gap to .100. Each location was either 9.59 or 9.62 plus or minus. It can take awhile to collapse a fully pumped up lifter. Good luck.

 

Well with the lifters in it is impossible to compress them by pushing on a pushrod. I tried besides it is all academic now anyway.