Hi Dan and all.

I am in the process of build two Gardner ABC ST60 using the latest K version (the one with concave head top). At least in the two I am using is necessary to lap the external surface of the liner because is not possible to mount them in cold.
The project is temporaly delayed building the nylon insert to fit the sleeves in the lathe to make de right adjustement.

I don´t know if the fit with the older cases will be betteer....

Just for your info.

Kind regards form Spain.

Manuel Cortés.

DEFINATELY HEAT THE CASE .

A heat gun is way best . Do a test - Just drop it in say 1/2 or 3/4 inch . case cleaned & oiled . Then check piston fit- from inside up through the case .

Them Bolts are 5-40 . for the hundredth time ! . 

Clean the cases thoroughly . But Id hesitate to lap them out . But Id never carve down the liner O. D. . The Green 3 M pot scourers & disolve lacquer / carbon off .

Oil to fit liner to case , or anti sieze .

Yes , youd want to be very carefull .

Oversaw, saw over, cracked the whip ,  well - offered moral support ,

Whikle a olde fart bored a Kieth Black Hemi block for new O S liners , took two days of daylight with his clamp on the deck face boring machine .

The Glad recipieants collected it monday . All the sleeves a lightish hand push fit in the alloy block . By thusday there was pandamonium .

All Assembled it wouldnt turn over . Probly the head bolts pulling things about .

Another weekend taking a few thou. out , so  the sleeves dropped freely and unobstructed .  Happy Campers , turned over fine .
Was the Ex ' BALOO ' NZ Nitro Burner , running methanol & Iron Heads , to hold the well used block inline . Aledged 1.000 horsepower .
And the record & championship in that class that season . Around 97 . 

So ' The Correct ' fit is important . But correct is where you need to get, for that set up .. talking %ages of a tou. I would think .

Probly exactly zero - for a thumb ' push fit ' . Cleaning the case bore thoroughly may well get it there .