Solid Roller camshaft selection those of you running a 408 race application - lobe seperation

Since you’ve found weak cylinder pressure on half your engine, I myself would try the old cam out straight up without any advance and see how it behaves to establish a new baseline. The only way I can see a cam needing to be advanced in a four inch stroke LA is if it’s too large (I’m pretty certain that’s not the case!) and the car is under geared with too tight of a converter.
I mostly agree with this. I've stated in the past that this car with 29" tires needs either 4.56 or 4.88. The converter is definitely an issue as the car went faster with my spare converter in it. I do think the can needs changed as I believe Bill ran it before having the heads done and wasn't happy with the results. However, it was with a underwhelming converter.