What is the stock, std. bore of an LS1/LS6 block?
More specifically, the 12561168 casting.
I've found new blocks (all same GMPP number 12561166), listing 3.900"(Scoggin-Dickey), 3.898"(JEGS), and 3.890"(SUMMIT) finished bore. GMPartsDirect says its same as 12561168 bore. Whats going on??
I have stock pistons I want to use. So I just want the stock bore as it would have came in a GM car, but I'm confused.
https://sdparts.com/details/gm-perfo...parts/12561166
http://www.jegs.com/i/GM-Performance...61166/10002/-1
http://www.summitracing.com/parts/na...1166/overview/
http://www.gmpartsdirect.com/results...umber=12561166