yeah i went 11.58 all motor and it should be way colder this friday (or next) than it was when i ran, so i would look to go lower 11.5x's anyway (possibly better). i would think a 75 shot would put me in the 11.1x's or 11.0x's, but the way this thing pulls i would not be surprised if it went well below that. i know nitrous hits hard, but this thing makes my eyes bug out of my head. i ran a 125 shot on my stock longblock for a long ass time, went 12.5x's @ 108.xx all day. its probably just in my head, but this 75 feels like more than the 125 gave me before. my guess is that i wont even need to go to the 125 shot.
i have ARP main bolts, no girdle. the girdle doesnt add any strength to the block where it splits, it just helps hold it together when it does. but my intake manifold, bell housing, timing cover, and oil pan all do that already. i did alot of research and talked to my machinist about those girdles, and they help where the stock roller blocks dont need help.
most of the people who split those blocks do it with too much timing. ive seen people split them making less than what i make now. i talked to a few forced induction engine builders about boost/nitrous on these blocks, and people are putting 550+ to the wheels on single turbo set ups with these blocks. they are just taking the necessary steps to avoid detonation. really its all in the tune. and the rpm range you operate in. the vibrations from twisting really high rpms can hurt these blocks even at lower hp levels. i shift my shit at like 5800-6000k, so im avoiding some of the trouble right there.
on the other hand, some of them just split. proper tune, proper everything and they just break. nothing you can do about that, so i cant worry about it. im just gonna run a safe ass tune, and hopefully a 10.99 or better!