All the stock stuff is very strong and would of worked just fine for the power it was making however I knew the pistons were worn out and loose hence the over bore and upgrade. Like I said this car is sold and I'm working on the plan for a Ls fd build. Going to look at a shell tonight. Gonna take all I learned from this build and build one bad ass twin turbo Ls Rx-7. Will post a link here when the build thread becomes available. You can catch some of my fabrication and weld porn pics at
http://www.facebook.com/DowngradeFabrication if you need any custom turbo manifold work that's my side business there.