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My friend has a 78/79 eltigre cross country, that he bought not running. He did a swap job and in pay got a chassis and engine from a 91 cat. The 91 cat's 440 has a hole through a piston. We have checked on a couple of aftermarket pistons sites and it seems that the pistons from the eltigre should fit into the 91 440. Does this work? Or has anybody put a 90's 440 into a 78/79 eltigre?
 

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If the bore and stroke are the same, they will fit. But, compare the skirts for any porting differences.
 
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