New in here need some advice SB 360 Cam selection

Robert
IMO, you're asking too much. Your focus is too broad for a 727.And also too broad for a 340.
The biggest hitch is the 3.21 gears.
If you are talking about beating them in a dragrace to 90, and then shutting down, then;
You can gear your car to hit the top of the powerband at 90mph, and call it done; all with the current combo. This would take 4.56s or so, to hit 92mph@5600 with 26.4 tires and with 5% slip in the TC.
This will get you off the line with 42% more TM (torque multiplication). And you will be ramming thru the gears way faster, putting down more average horsepower in each gear. And the 268/276/114 OEM cam peaks fairly early, perhaps at 5000, but the top of the curve is broad and flat asa a ,well just broad. So knowing that 5600 is about the right trap rpm, you will need to outshift at perhaps 6000/6200 in the lower gears, to satisfy the trans gear ratios. This means the valve springs better go there, with at least a couple of hundred rpm in reserve.
This also means that all engine mods are optional.
And it means cruising 65=3771@zero-slip. See what I mean?

Another option is to chose the biggest hi-way gear you are willing to put up with, and then tune the engine to work with that. Unfortunately, Ima thinking 3.73s will be your preferred max; 65=3100@zero slip. That means 90 will be 4264, and no matter what cam is in it,third gear is in the dog-house. 4264 is barely at the torque peak. You will need a much bigger engine to embarrass those guys.Ima thinking a 416 would get you close. See what I mean?

Another option is to just supercharge your current combo.

And finally, you could just build a fun car and gear it to hit 65 at the top of second, and stay legal.Let the Volvos go.Oh wait, that's 4.56s again.
Ok make that hitting 65 at the top of first, wound up tight to say 6800. That would be, magically, 3.21s,lol. To trap at 65=6800 will require a power peak at about 6000, so Ima thinking, that's gonna take about 292* of intake duration, and that is gonna want a 3500TC. See what I mean?

But if you had a 416..... now your talking. the 3.21s can stay, and a 2800TC will do it. Of course you might need a wagonload of cash, to upgrade the chassis to handle that. See what I mean?.

But if you are talking about out-running them over a long distance, that is a whole nuther matter.