I have an Ls1 with 241 heads shaved 30 thou and 0.45 head gaskets. Quenched 35 thou fitted. Bowls on heads blended. 3 angle grind job on valve seats, standard size valves. same spec cam as used in trickflows 500hp top end kit. 220/224, 278/282/ 0.575/0.575 lift on 112 lsa. If Stock compression is say 10.1:1 , any ideals what compression I am running?

 

Wallaceracingcalculators is a great site where you can punch in all your numbers and get right on for your compression....I'll guess right around 10.5-10.7:1 scr, but would need the actual cc of your head chambers....I can't remember the formula right off hand for how much cc from milling you loose.

After milling my 241's a few times I ended up taking them down to 57cc's the last time.....did a bunch of grinding in them to really open them up and make them flow....is have to dig for my pics, but would love to see pics of yours!

 

I think the links in this thread may be what you are looking for...
https://ls1tech.com/forums/generatio...ssion-lq9.html

 

I shaved my 241s .030" and figured comp. at 10.75 with GM headgasket.
Your thinner gaskets should put you right at eleven.