i found this car on streetsourcemag.com
Here is the link

doesnt the stock sized bore with a 4.47" stroke sound odd?
ive never heard of anything over 4", but thats me and im not really good remembering numbers
arent most typical "427" motors a 4.125 or so bore, and a 4" stroke

 

yeah ive never heard of this either, i wanna know if its bs or not as well. i mean ANYTHING is possible with $$$$ but my gut tells me BS on this one. i dont think he has a custom crank in that car...once again could be wrong, anythings possible.

 

well....4.47" stroke with a 3.9" bore would make 427CID but I don't see how it could fit in the block.....people say that to do a 4" crank they need clearance the block...so another .5" stroke....I don't see it working....


if it does fit....holy crap....thats a 486CI LS1 with 4.160" darton sleeves

 

HOLY **** @ the 486! my god that would be amazing!

 

he could of bought a 4.25 crank and offset ground it to a 1.8 acura bearing to get to 4.47 but i dont think that anyone makes stock lenght rods with this bearing. eather way, he is looking at a .9 compression height which doesn't leave much room for good rings and with the smaller bore and longer stroke, he would have to much valve shrouding for the cubes. i will call this eather BS or if it is true, a very bad idea and should of spent the money on an all bore engine.