hey guys i got a question. well i blew a head gasket a few months ago on my 95 Z28 M6, had the heads sent in to be milled down and a valve job. I put everything back together and now i dont have that torque and power like I used to before the blown gasket. The only thing i added was a msd blaster coil. Any advice would be great. Thanks.

 

Do a compression check, and check for codes on the computer.