Scaling the prime pulse injector constants is kind of art.

There is some write up on older threads, but will need to dig it out. Usually you need to convert the pulse width to grams of fuel, than scale new injectors and convert back to pulse width. There is also some scalar used in conversion in calibration, Other table that affect starting is start up spark advance. No need to touch VE tables, it will get worse.

Just keep playing with the prime pulse.

Usually lt1 starts in a fraction of a second, no matter what cam is in there.