The 'ES3' hotrod locally that could outdo manxes about 20 years back began with new steel flywheels and a manx rod and piston,
then had a very heavily worked downdraft and swirled cylinder head - to give +manx+ style porting and dimensions.
And had a set of cams to match.
This all about 20 years ago, so too early for the internet to show it, it seems.
Will see if can find a pic.
He figured Nascar pushrod engines could be made to rev to 9500,
which is more than a manx anyway,
so there is no reason a pushrod ES2 couldn't be made to do similar.
And have +manx performance...
P.S. This is how Wiki shows a model similar to the one for sale ere might be expected to look, in as new condition.
Few errors in that resto, particularly it should have black painted centres to the wheel rims.
http://upload.wikimedia.org/wikipedia/c ... e_1949.JPG
Seriously handsome, rugged - and heavy !