I have a ring removal tool, thanks for the offer, but the rings are so well seated and stuck in, that there is no discernible gap to get anything in to spread the ring, not even a tiny punch or drift...I even sharpened a small watch makers screwdriver to a very fine blade and still no joy in getting in the tiny gap.....very mindful not to damage the land or groove....
I am desperately trying to save this engine, I think it can be done, and whilst I have rebuilt a few V8's I have never done one this seized, caked in corrosion or been left for so long with the spark plugs out allowing the world into the bores!!
once I get the rings out, it is time to turn attention to the heads.....which I think is the part I am really not looking forward to, as the valves, guides, seals and seats are no doubt shot.....
I have looked through our machine tools and I don't have a 46deg cutter of the right size to clean the valve seats, so hoping they are not too shot and can get way with a good scrubbing.....The LR tool for valve seat cutting is not a stock item, lead time is after Christmas and is about £140....
https://jlrequipment.service-solutions.com/en-GB/Pages/ItemDetail.aspx?itemID=47239&catID=331790
So that's out.....with luck they aren't burnt, pitted or cracked.....looking at how the rest of the engine has cleaned up not to bad, it is hoped the heads will do the same.
Researching other makes of 46deg cutters....America looks like the most common place for them
Once the heads are stripped....time for a cleaning spree...
Boiling them in a pan of water/vinegar may do some good.