AJ, with all the love and a smile on my face, the following is said, NOT to piss you off or insult but STHU!
David, AJ is only trying to help, but is over analytical. Splitting hairs not just once but 5 ways until Sunday.
Here is my take on a 300 HP 360 engine.
Should the engine be in good shape to begin with.....
There is no shame copying an engine build. Start with a look at the 340 engine. Copy it and add headers.
You do not need the higher compression ratio to obtain the power. The 340 actually made more than 300 HP and adding headers improves that power.
A stock intake and carb can deliver the power you seek easy, BUT...
The RPM intake will add power. IMO, approx. 20 HP. The 800 carb will not add any significant power. But should be easy to obtain parts for tuning over a TQ carb (which I like better.)
For your car, I suggest headers by Doug or tti headers. Awesome fit without smashing them on the road. They are pricey but OH so well worth the cost.
(TTI also sells a complete header back to the bumper exhaust kit in a box. I had minor trimming on mine.)
I would like to see this done with the stock heads and 2.02-1.60 valves with a good valve job.
You can use less camshaft duration then the one you list above. The cam manufactures can get you a copy of the 340 cam easy. The 90's area engine is a Hyd. roller cam engine. Send in the core or purchase a new one, your call. Re-use the factory roller lifters on your new or reground cam.
Should your engine need to be rebuilt, IMO, a set of speed pro slugs are an excellent slug for the project and Summit racing sells them with rings for a good price. Just tell your machinist that you want a 9.0-1 (no higher than 9.5-1) ratio for pump gas and iron heads with the cam specs your going to use.
All this from the ...
"Been there, done that camp."
Upgrade the rear end to a 8-1/4 min.
Any gear ratio from 2.94 - 3.55'snwill work. Make sure the V8 trans is in good shape before installing it. (You can not use the /6 trans.)