I have 12 NOS solid lifters in an original GM box. The end of the box that had the part number is missing. The lifters are the new style. (not the milk bottle type). The push rod seat is a solid machined smooth dip in the top with a relief machined in the side. Hand writing on the box indicates they are a two piece; a separation line appears about 1/4” from the bottom. They are the correct diameter; however, they are approximately .0962” shorter than other lifters I have. The short lifter is 2.188 inches tall and other lifters I have are 2.315 inches. (measured with dial caliper) Was there a change in the design over the years? Can this short lifter be used in my 261?[img]http://[/img]
