Pushrod for hydraulic cam and 273 rocker arms
I did some calculating and laid it out on AutoCAD, but the problem seems to be that they don't specify where the measurements are supposed to be taken...
I compared the two lifters and found that the push rod is .257" taller in the hydraulic lifter than on the solid lifter from a 273.
I then backed that into the push rod length and figured out how long the push rod would need to be for the hydraulic lifter.
See the illustrations below:
I did some calculating and laid it out on AutoCAD, but the problem seems to be that they don't specify where the measurements are supposed to be taken...
I compared the two lifters and found that the push rod is .257" taller in the hydraulic lifter than on the solid lifter from a 273.
I then backed that into the push rod length and figured out how long the push rod would need to be for the hydraulic lifter.
See the illustrations below: