Daily driver 318 roller cam expectations

Right now I am just bench racing ideas for my 1967 Dodge Dart GT. Body is rough but solid. As in no rust but plenty of wavy panels. I have owned this car since college and is my 1st car I ever bought. Now this is the engine section so engine ideas are what I am discussing. Over the years I have had 2 different 318s. I rebuilt 273 and a rebuilt 340. Currently there is a large void where the engine should be. There hasn’t been an engine in it since 1997. It has dual exhaust with manifolds currently with some stock style turbo mufflers and 2 inch pipe. It has an 8 3/4 rear axle with 3.23 to 1 rear gears. It has manual front disk brakes.
My plans change almost daily with what I want to put in it but my current thought is a low mileage 1991 318 long block with roller cam. I still have the 340 short block but it needs to be rebuilt. I also have a 1969 440 short block under the bench in need of rebuild.

Right now I would like to build a fun car that is also stock enough to drive out of town for or even out of state. You know like a regular car! I still like performance so I don’t want it to be a pig. Good mileage is as important as good performance. I still have the intake I used on the 273 (Edelbrock LD4B). I have an extra set of headers if I want to use them. Any way. I look forward to hearing others thoughts and ideas.

My absolute fun combo for a car that goes anywhere at anytime with reasonable mileage in the smaller mills is;

600 cfm carb or TQ
OE iron intake, LD4B or Performer
Stock heads
Headers optional but favored into a min. 2-1/4 though I favor 2-1/2 Summit/Jegs exhaust with an added H pipe installed.
Open air cleaner, Chrome box (or better) recurved distributor

I have used twice a Crane cam on a 112 which may not be the greatest by it provide a smoother idle.
216/228-.454/.480-112
Works with a stock converter and tire very well. Power to 5500. W/3.23 gears, it made for a good driver. I myself would not go numerically higher than 3.55’s.

I would suggest more compression than stock (milled heads or piston replacement?) and bowl ported heads with larger valves.