[camaroboricua]

As the title states, my engine seems to be lacking some top end power. It kind of stumbles and seems to lack a lot of response above 5K. My set up is a stock 69' 350 shortblock with World Sportsman II heads P&P and Lunati cam that specs out @ .507" lift and 235*/235* with a Holley 750 cfm carb and for ignition I have an MSD street fire HEI. It seemed to run best with about 36* timing without the vacuum.

I think my problem is the HEI cannot keep up above 5K because ive tried adjusting the carb and the timing every which way and the problem has never gone away. Please help with any ideas.