High Performance 318ci
So what changes to my initial idea do you guys suggest? I posted this to get corrected.
I think you need to aim at the real target.
Another thing is that owner of the car is simply looking for some extra power... He wants to keep it 318, keep reasonable gas mileage and make it good long distance cruiser with some extra kick.
If these are the real goals, then shooting for high power is the wrong target.
Stock 318 is very reasonable gas milage. We (my folks) got 21 mpg on the highway with our then brand new 1969 318 4 door Belvidere equiped with slushbox and a/c.
Especially with a 3 speed torqueflite, gearing will matter for good fuel milage. In parades, stoplights, idling milage is zed, zero, zip. Measure gallons per hour like a boat.
Long distance cruiser. Already stated - stock is a solid performer.
Extra kick. OK. But where?
Off the line? Then how about a low first gear? That's doable option.
Passing on the highway? Fair enough. The two barrel and exhaust are somewhat restrictive at these rpms. A well tuned small four barrel set up and dual exhausts can aid there and if done right, shouldn't hurt the other goals.