Does your 848 head have the extra water passage holes for the 261 or will you drill them?
I'm not sure yet. Not a big deal either way. It's an easy modification from what I've seen.
You need to be aware that the main bearings for that year of 261 are almost nonexistent. It's possible to use the later model mains, but you'll need to do a little grinding on the block where the anti-rotate tabs fit at the parting line between the block and the maim cap. PM or call me for the right part number mains and how to make them fit.
Jerry
Thanks for the heads up Jerry. I'll definitely keep you in mind when I'm ready to start ordering.
