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Will a 91 indy trai 488 fan cooled heads,sleves and pistons fit onto the crank out of a 91 440 indy sport fan. Or are the pisons the same size and just the carbs different sizes. Need to get the sled going before the end of winter.
 

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SOUNDS LIKE A GOOD IDEA!I WOULD SIT BOTH CYLINDERS SIDE BY SIDE AND TAKE A GOOD LOOK .LOOK AT THE BASE AND MAKE SURE THEY BOTH FIT THE BLOCK THE SAME. GOOD LUCK
 

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pistons are different,bigger bore on 488,but the stroke is the same,
i would say it would fit,,,anyone else
 

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If the stroke is the same, it should work. You will have to set your carbs for the smaller pistons, or maybe use the carb(s) from the other sled.
 
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