Goals and advice needed

I cracked a 12.9/106 quarter with a modest 360 @3650 pounds, 3.55 gears on street tires, with a 4speed ........ and thru the full-length 3" TTI-duals.
The Wallace calculator says 357hp.
Same engine, different carb and geared at 75=1850rpm went mid 20s mpg on the hiway and one trip made over 30mpgs.

Same engine one size bigger cam, went 93 in the Eighth @3457 pounds; 3.55s, open headers, and splitting gears with a GVod...... What a blast!
The Wallace calculator says 431hp.
This combo likes it's gas. But probably my fault cuz I bag-drive it, and cruise rpm is now up 40% for 65=2240.. versus 75=1850.

My 360LA is just a plain-jane Zero-deck 360 with OOTB Edelbrocks/1.6 arms, and a ancient 750DP on an AirGap.
The smaller cam was a Hughes HE 2430AL, 223/230/110 in at 11.3Scr
The bigger one is a ..... Hughes HE3038AL, 230/237/110 in at 10.95Scr
I liked the smaller cam better on the street, but it lost lobes when the oil manufacturers took out the zinc.
These are NOT my opinions, I already built and drove these combos for many years.

Here is my opinion;
Not a chance would I build a 318 for twelves,
unless it was a dedicated track-car, and I had gobs of money, or, the car it was going into didn't weigh nothing....