I make sleves for the engines that require no block boreing, I figure if you are going to bore the block than you may as well go for a large bore, the work is the same in the end.
The bottom counterbore in the Allis blocks is 4.475" so this will allow up to a 4.3" bore with no block work, depending on how far down you pull the piston and what the rod angles are. I do not run an O- ring though, or they get to thin. I make the sleves from either John Deere 404 diesel or the newer 4045 or 6068 engine sleves. Take out ones are abundant here, the 404 is a 4.25" bore and the 4045 and 6068 engines are a 4.19 bore. I make them to lightly press fit in the bottom counterbore with a little sleve retainer around them. They sit square on the top flange just as the OEM sleves do.
I've got a W201 engine right now that I'm fixing up for an unstyled WC restoration project, I had to buy parts or make my own anyway so I used a common set of replacement hyperutectic 4.28 bore BBC pistons, the Deere liners and a set of rods to make a 280 CID engine for it without putting much out of pocket in it.
I looked at and measured up some John Deere 3020-4020 gas pistons one day at the salvage yard, with the 262 Buda rods, a set of home made sleves would have been the other combination I was going to put in it. The John Deere pistons were a good match and have plenty of material on top to machine for any desired compression ratio.
I had talked to Power Bore liners about makeing the sleves to my dimensions as I make and sell a few sets of these from time to time. I wanted to just buy them and stock them here rather than make them. If I made a few it was going to cost about $115 per hole for ductile iron ones and if I make a large quantity down closer to $80 each. Grey cast would cost less, but shouldn't be cinsidered an option when they get thin or rod angles get poor.
Edited by wi50 - 11 Jan 2013 at 12:51pm
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