Yes and no. I never had valve reliefs cut in but instead went with the TFS heads. If you need a link let me know. Your'e restricted on lift and duration on the cam for an 86. I do know however, that you can get the pistons flycut without having to pull the motor out of the car. I've spoken with a few other 86ers that have had the pistons flycut. Most automotive machine shops should be able to hook you up.