[Healeys] 100 engine bore for sleeves

[Larry Varley]

Hi Guys, does anyone know the safe maximum bore size for installing 
sleeves in a 100 block that won't go through the bore wall into the 
water jackets? I have to decided to freshen up the 100 engine, when I 
stripped it down after it's factory original 8000 miles there was an 
amazing ring groove in the top of the bores, which I have also seen on 
other 100 engines indicating that the iron is quite soft, so I want to 
sleeve the block and improve the bore quality. I'm looking at 3 3/4 OD 
sleeves, but could drop back to 3 5/8 if I must.  It will also get 3 
7/16 plus 060 semi dished pistons, 100M manifold, 1 3/4 carbs, lightened 
flywheel, a moderate camshaft and balancing. The original untouched head 
will be left alone.
Cheers
Larry Varley
http://www.acmefluid.com.au/larry/