well you found out what can happen with detinaion and boost on a buick ..

If you find another dont kill it you must keep them in tune and no less than 93 octane and they prefer exxon fuel over any other brand around...I have tried them all

boy in richmond got one for sale with desent miles on it but its ttop ...if interested let me know I can link you to his for sale ad later

I done rear seal and timing chain in it not long ago