Thanks for the suggestion that was a big help, I wish I would have thought of that sooner. They were really in there
. Unfortunately a few still stripped out and I had to weld a bolt to the end. Even then they had a difficult time coming out and sheered one of the bolts off! No locktight, so Im guessing they were really cranked in at a previous valve adjustment.
The progress so far:
The rear cams looked fine. The cam carrier had some wear in the journals, but I think it is ok.
The rear cylinder had an obvious head gasket leak, but everything look in good shape. Plenty of hatch markings on the cylinder and the piston skirt looked good.
The rear piston rings end gap was under the .5mm wear limit, coming in about .45mm.
The piston measured 99.94mm, under the wear limit of .93
Everything looked very similar on the front.
The piston spec'd out .94, however the piston rings had much more wear, being over the .5mm (around .51). Im not sure why the front had more ring wear
In the process of pulling the fly wheel and clutch basket to change the timing chains and oil pump pressure spring.
Overall the ending is very clean inside with no signs of crud or build up.