So I'm working on building a stroker with gsr block and ls internals with b16 pistons. I got this gsr block from a friend and I was going to bore it to 81.5. After looking at it, looks like there was a little damage on the bottom of one of the cylenders. just wanted to make sure it would be good to bore it 81.5 or should i just do 82.0 I have included a pic. Let me know what you guys think.

 

And here is another pic.

 

looks like it had a bent rod.
the piston doesn't travel that far down at all so overboring it to 81.5mm would be just fine.

 

Yeah it had a bent rod, so it should be good to go then, good deal. Got the block for free.

So here is my build. would like to know guess on hp and tq.
Gsr block bore 81.5
micro ploshied ls crank
eagle ls rods
Nippon 81.5 b16 pistons

Head is a b16a2 with type-r internals
Type r intake
dc headers 4-2-1
greedy evo 2 full cat back
kinda cheap build but hey.lol I think it should be decent.