Which distributor should I use?

Right now there is a 600cfm Holley on a street master intake.
Stock manifolds
Stock cam
Stock points distributor with blaster coil and really old stock wires.

What I have going on is a set of headman short headers with 2.5 dual exhaust. The headers and double roller chain are not installed yet.
I'm working on a performer intake to get rid of the streetmaster.

Ahead I will port the exhaust side and mild port the intake
Maybe some milled 302 with bigger valves and some nice valve springs. Run the 262 or 270 cam and be done with it. I'd like to get about 250-275 out of it and leave it there. Run some 3.55 locker gears and have a cool spirited street car. Stock wheels and tires with some sway bars and Be done won't it. I'm not going overkill with this car at all. I used to have a 440 in it and it was just too much for what I was looking for. Its suspension and brakes are all upgraded for the bigger engine and its still 440 ready.

The 2 barrel description was only to show which electronic distributor I had that came from a smog era car with no performance additives somyou all would know what I was working with. This is a budget build.
In a sense I'm trying to understand the parts I'm dealing with and how they need to be chosen and modified.
I'm ok with points adjustment but I'm really looking for the best option between these two distributors

It was a lot more info than I expected and was very welcomed.
I've still got that flat spot off idle and I figured that upgrading the ignition system would at least isolate that as not the problem.
I think it's in the primary transfer slot. The ignition system needs to be upgraded anyway. I've not even looked at the problem in a while.
I was trying to sort out here whether I was going to put the electronic ignition in or keep the points.

I also like simplicity that The pertronix eradicates the box and the ballast resistor . With what trailbeast said in that the coil really does a lot of the hotter spark kernel. That hei coil upgrade looks like a nice upgrade. It's the coil that reall does this hotter spark and not the module?

Performance wires are a must.

I can always add to this later. I am looking to get this done without back tracking after the cam install. Like buying that streetmaster intake just to remove it and go with a performer intake which I'll be staying with. I don't want to get into the 360 head edelbrock performer rpm stuff.

Now I'm looking at
1. pertronix in the points with a hei coil
2.Leaving the points and adjusting gap and dwell with hei coil
3.Recurving the electronic with a hei module and hei coil
4. adjusting the points with the blaster 2
5. Recurving the electronic with the factory box

Either way it sounds like I'm going to end up recurving eirher of these distributors for a faster advance.

Thank you guys for your patience. all of this and the other posts really help and I'm really getting a lot out of all of it.