Chief, I have never had this motor running, its just one I have had hanging around....I am not looking for a new motor out of it, just something to run for a bit while I get my other motor together....
Scamp, The way I see it is that the ridge should indicate the size of the bore when it was last machined. I have measured just below the ridge where the rings make contact guessing that that is where the main wear will occur. This is what you are saying isn't it....Yes, I have a manual, and pretty much tells you to do the above along with a measurement at the bottom of the bore and that's it.....
Without knowing how much taper to expect and knowing how much wear tips the balance for a rebore and new pistons to be needed, the measurements mean nothing.....I have been advised that any more than .004 wear, then a rebore is require, under that, provided that the bores are in good condition, then new rings may keep things going for a bit longer....
Does anyone agree with that?