So I have a 94 stang lightning block 5.8 swap Holley heads trickflow stage 3 cam pushing 500+ crank pushrods have been measured at the correct length runs fine after replacing pushrods valves are sealing so the pistons aren’t contacting the valves do I just need hardened pushrods for this amount of power? I just keep snapping the heads right off right around 6500 rpm