If you can bring it out at say like 4500 in 1st on a good tire, that fucker will maybe bump a 13.8-9 (stock), but the stock clutches in these tend to suck, as I tried that with the 315's on the back and went slower as I couldnt bring it out as hard without hurting the clutch.
I could see as much as maybe like high 97mph ish, 98 on a factory freak IF you brought it out hard as fuck in 1st
Like I had said before though, you will need a tune (or should at least have one to maximize shit) with all the other crap. With the 'full boltons' sorta route, and a tire with a clutch on stock 3:42s, I could see the car running well into the 13s, but not on those factory 16s on a stock clutch.
The lt1s are alot of fun down low, but once you get them into 3rd, you are wheezing and that's where you are going to have to make up your ground on a so-so launch with stock crap. It's why you will always get cars put on you by a stock ls1 after the top of 2nd. Maybe with a gear the lt1'd do a little better.
They CAN fly but only with the right combo and driver. I don't mean to knock the lt1's because I kinda like them and I do like how much they can pick up using stock heads (reworked of course) and a matched cam. For older tech on a budget I like them alot, but most are fairly ratty and underdriven/maintained.
Matt Mochella's (sp?) lt1 you will see out from time to time is a perfect example of a clean, tastefully modded and well driven car that goes 12s regularly without a very wild setup at all.
You HAVE to be realistic, especially if you've never ran it before....pray it's not hot out. They love to heatsoak and and opti works best on a cool run
Watch your oil pressure too if you're twisting the fuck out of it...
There ARE reasons why people run the ls shit now
It whistles while it WORKS.
I suck.