Edelbrock makes a recreatable package that does what it claims. There are too many poeple tring to be different when it comes to cam selection. The cam and intake are a match. How many diffrent intake types are there? The rest is bean counters looking for a extra few hp.
A roller is only going to be 15-25 hp higher than a flat hydraulic, in the range of a driven car. I have a roller in my 440 4spd and the diffrence was NOT amazing. For the money to retrofit I was robbed. A supercharger would have actually got the job done with a big smile. A roller cam conversion was more than half that cost.
The suggested Howards cam even states 2600+ stall. The plus indicates more than. Stock modern heavy vehicles are stalling around 2800.