I have a 95 lt1 Camaro motor in my 69 Nova. Just had a MSD optispark and a lt4 hot cam kit installed. I don't notice very much difference. I really was expecting a lot more thump from the cam. My mechanic said I need to upgrade my 8 in break booster for more vacuum. Should I be getting a good thump at idle Or am I expecting to much from the LT 4 hot cam. I understood it was a upgrade to the factory Corvette LT4 cam. Will a Dino be able to tell me about what size cam I have. Thinking maybe someone switch out the cam I bought and installed something else. During the install. Will more vacuum help.