the 660 and early 706 has the same engine. the 460 has the 236 which is a shorter stroke.
 
460; 560, 656, 660, 706 all had the same block/crank, I suppose a 806 gas tractor but that would drop the hp if you are talking the same block.
 
do u know that for sure as in hands on checking? or hear say? i have measured my 460 block against a 282 block and the 236 block was shorter in height. i have also used 560 pistons in a 460 block and dont see where they differ.been hearing this all the time but i actually did that with no problem. i know they are both the same bore. from what i have seen the con. rods are shorter.
 
The D282 block and the C263 share the same crankshaft specs, and part numbers. I have a gas with the diesel crank in it. I believe the C301 is the same but have not crossed the numbers. 606 is the same as a utility 460 but with much better steering and hydraulics. I am more referring to what will BOLT in it. The 560 I have has a gas engine with the diesel crank, clutch,flywheel and starter because they were in better shape from the donor tractor. Runs very good. Heads are different between the engines as the valves are larger even between D282's in a 560, 656, and 706 so performance is different. I had a 706 with a D282 in it but believe it to be a 560 engine because we could not get 72 hp out of it to save our souls. This was on a dyno with a fresh major overhaul and a certified mechanic doing the adjustments.
 
Connecting rod have the same part number. Wrist pin hole in piston allows the longer crank to keep from hitting the head. I would think560 with a 460 crank would be lower in compression. I had a couple 560 with 706 pistons.
 
D236 and D282 had the same deck height. Rods were the same, crank and piston pin height were the difference. Early diesels even used the same rods as gas with the smaller pin, then IH made the diesel pins larger. My guess is some one cut the deck lower on the 236 block you had. D301 is the same height also, yank the sleeves from the 236 and 282 and you have the 301 bore size, BUT you will still have the counter bore at the top to deal with. The late 236 and 282 blocks with the heavy press fit sleeves have a much smaller counter bore than the early slip fit sleeves used.
 

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