[tubman]

On my '51, with a slightly modified Mercury engine (Rochester 2G, Edmunds heads, and a Mallory dual point), anything above 2700-2800 starts to get uncomfortable. For me, with the tire size/ rear end ratio I have, that allows me to cruise about 65-70. It will easily go higher than that, and will run over 4000 "going through the gears".

I do not like running it over 4000. It doesn't seem to do any good anyway.