As a side note with the aluminum block architecture...These things are sleeved, and then bored and honed to final size....At the standard 4.5 bore, the sleeves were either really thin or the aluminum wasn't machined correctly before the sleeve was put in, because the wear that we saw on the cross hatch in the bores was substantial....It didn't help that the honing could not take fix the out of roundness and taper the bores in the Indy block had...With a big stroke, the piston skirt is really short and it tends to shingle in there if there is any place for it to go....

If I were to do it over again, I would rather have a thicker sleeve and more material behind it, than a bigger bore....or just avoid the whole mess all together and go cast like I did....