New torque converter?? (and cam question)

The cam you have now is good for the gears you are running.
A good cam would have .530 lift and a tighter center line like a 108 or 107.This is because your heads flow well at .500 lift.
It's just hard to find a cam with so much lift and not loose cylinder pressure due to a very high duration.

QUESTION>>>Are you running adjustable rocker arms???
And what 268h comp cam are you running?????

When you go higher in duration you will loose cylinder pressure due to the intake valve closing later.
A tighter center line will close the intake valve sooner and let you run more duration with out loosing cylinder pressure.
In the end you have to look at when the intake valve closes and compare that to the cam you have now in the engine and what you get for cylinder pressure.
Before you go any further check your cylinder pressure on your motor when fully warmed up.

Comp cams is saying that you need an adjustable valve train to run the cam you picked out.