Last season I rebuilt a set of Comp 869s for the 3rd time.1 lifter had to be replaced with the superceded lifter.Even though the the link bar is at a different height it was not an issue.I have gone upwards of 8k miles on a rebuild which was close to 10k miles.640ish lift with 560 over the nose.
545 inch blown hemi that makes the track 4 or 5 times a year if I'm lucky.

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HEMI-ITIS has no cure.
My condition is fully BLOWN!!