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400 to 426 conversion, the easy way

50 posts in this topic

The 426 piston uses a larger wrist pin, so you'd need the 426 rod

That would allow you to use the 400 crank.

ok so with the 426 cylinder/450 piston and rings you can use the 400 bottom end AND the con rod?

im trying my best to undertsand this all before i make a purchase...

and on top of all that the stock 400 head with decrompres exhast cam..?

Edited by yz00

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ok so with the 426 cylinder/450 piston and rings you can use the 400 bottom end AND the con rod?

exactly. 400 bottom end + 400 con rod + 426 jug + 450 (5TJ) piston and rings

and on top of all that the stock 400 head with decrompres exhast cam..?

yes

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so will the 426 jug bolt up and use teh same gastkets as the 400 jug?

the base gaskets are the same. the cylinder head gaskets are different p/n

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the base gaskets are the same. the cylinder head gaskets are different p/n

The difference in the head gasket is the 95mm vs. 92mm bore size. The bolt patterns are the same between the 400 and 426.

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ok so one more question on this matter. on my 400 turns out the head is bad. my queston, i already have a 450 piston and a 426 jug but now what should i put on for a head? im guessing the 426 is only going to bolt on and would be best choice?

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Anyone have an issue with the wrist pin either being too long or something so that one clip won't fit? What should I do this is the only thing holding my conversion up 

 

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