Can I mount this on my stock internal motor or not? What fuel
Pump is required?

Thats a wide open question. All depends on what you are starting with. HP500?, 502mag?, 454/420?, 454/330? and so on. Need details to give you any type of answer.

It's a 454 my bad forgot to mention it

Does it have forged internals? What is the comp ratio? What fuel system is on it now?

It's completely stock everything

You need to tell Cobra, more details, is it a 454 MAG, fuel injected or carb, ect

Carb

Bump

I wish you had 2x with SBC manifolds.

Bump!

May have another will have to look, but not with small block manifolds. I would def look into a 250 for your application though. I think it may be the ticket.