Turbo sizing

What you're building has been done quite a few times by magazine builds and guys running modern mopars. If you can't find the info you need pm me and get you going in the right direction.

A single 76mm Ebay China turbo will reach those goals. Take it apart when you receive it and make sure you use the proper torque specs and thread lock.

You could spend more on a name brand turbo and not have those worries.

If you went twins you could run twin 57mm but I would go for the twin 61 route. You won't lose much spool time if any and your ceiling will be well beyond what you're describing.

I wouldn't push the stock motor passed 500rwhp. Most of the reading I've done suggest the pistons won't last very long above that power level. That will be in the 8-10lb of boost range.