Thanks for the info, but I was running an 84.5 set up until the valve introduced itself to the piston and decided that it was love at first touch. Head and block were decked and milled too much. The block was not sleeved and thats why I am looking for another B20 that I can bore to 84.5. This is an all motor set up that previously ran 8.4 @85 in the 1/8 with stock GSR cams. Looking to go with same set up but type r or skunk 2 cams this time.