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Hello guys, I was wondering what was the maximum (safe) stroke and bore of the 460 block, I heard Numbers like 4.75 inches of stroke and 4.5 inches of bore. I’m conscious that it means that some clearance need to be done for the crankshaft to rotate. I don’t know if it the absolute maximum or if can be even bigger?
thanks a lot
Mederick
 

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A460 block or cnc aluminum block can do 4.625 bore,and 4.750 stroke.thats about it for practical use.with a 6.700 rod you end up with a 1.410 rod/stroke ratio.this makes a 638.you could probably go with more stroke,but you end up with a very short pist and ring stack.short life! also,the eliminator blocks may go to 4.700 bore,with a 4.750 stroke thats a 660 ci.yea!
 

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1990 Ford Mustang LX 351M powered!! Project Cherry Bomb!!
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If I remember right, once upon a time, you could get a short stroke crank for em with a std bore that would get it to about 410 CI.. I think it was just for some class racing they used for em way back then... I bet with that big of a bore and a short stroke if you had the valve train right it would scream to the moon!!
 
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