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Now that you have posted your combo, I can pretty much guarantee you a “ real” convertor would really wake your combo up all over the time slip.
Would be nice to know how good the heads truly are, but that cam is almost 250@50, it’s gonna pretty much be a dog at where the convertor you currently have is hitting at. It would probably like something 42-4500 for sure. Even more.
You mentioned the cam, from what I have seen, it’s ground on a 108, it’s likely gonna be most happy stuck in at 104. You didn’t install it straight up at 108 did you?
If my understanding of that cam is correct, the above could really affect the time slip too, especially with the vert you have.