I have owned 5 Chevelles and never had issues that this Buick gives me.
I have had mine since May of 07 and have driven it less than 200 miles. Blew the head gaskets at the Midwest Challenge. Installed GN1's, 218/212 roller...blew the head gaskets again. Pulled the original motor and trans and stored them. Built the current motor and have now blown 3 sets of head gaskets with boost spiking out of control.
Got it back together just before the TB.com event in NC. Got some tuning done, made 4 passes, all was good. Came home and went for a blast on the street boost spiked like crazy and blew the head gaskets that I just installed with ARP studs. Motor coming out again tomorrow. I feel your pain but this car is NOT going to win the battle. New gaskets going in, solenoid connected to XFI going in for boost control. Transducer going in for ALKY pressure to be monitored by XFI. I will keep at it until I am able to drive it anywhere without fear of being left on the road.
Don't let the car win.
Good luck
Bryan