Should I stick with the edelbrock head gaskets (.039) and have around 9.7 compression or go with a Mr. Gasket or Mopar Steel shim (.020) to get my compression around 10.2? I just took off Iron heads I had used a steel shim on and there was no evidence they hadn't sealed properly. I really don't want to spend $100 on an MLS gasket(.027) any suggestions? Thanks.