1966 273 v8 cam suggestions and exhaust too?...it will never be super performance but

All great input for me....I would never run a 1/4.....probably never even go on the highway more than ten miles away....just plan on cruising around town.....going to work with it or grocery/task machine......I do have a 318 I could bolt up to it with but then I loose the originality even if I keep the 273 in the garage