Well since you asked for OPINIONS:
If it was My car;
1) I would leave the fenderwells alone, cuz, you know, they're already in there. But, if the collectors are pointing straight down, that I would change.
2) and as mentioned; I would do something with those brake-lines.
3) With skinny front tires, I would lighten the front end as much as is possible. For sure the battery would go to the back. and My car would have alloy heads
4) Another thing I would do is install the biggest rear tires that fit, and reduce the brake proportioning to the rear, cuz, on the front, you sure won't have much stopping power with the skinny donuts that fit there.
5) As soon as I could afford it, I would install an overdrive and set it up to cruise at something like 65= 2000rpm. I'm kindof partial to a manual trans, so, if a stock-cam 318, I would install an A833od
But; If I could not fit a manual trans, then I would at least get a higher stall convertor. I love my 2800.
6) my car would have;
-a cold-air intake
-HD T-bars and HD rear springs
-a modest sway-bar and
-Adjustable shocks
-an 8-3/4 for gear swapping
-at least 10" drum brakes all 'round,
-and I would figure out how to get 235s on the front, even if I have to rearrange the header pipes; and if I can do that, then I'm putting disc brakes on it, and
-if I can do all of the above, then the 318 is getting a modest solid lifter cam. and that means the A833od will be history.
7) Then I'm gonna start buying spare parts;
like a windshield ,And a more modern dash, a suspended gas-pedal, a diaphragm clutch, and if still a M/T, then
I'm moving the shifter back between the buckets, up high, and installing a short stick.
8) And by this time, it will need mini-tubs and bigger tires, and different gears. and the A833od will HAVE to come out, because the super-wide ratios, are no longer fun.
9) but, one thing that she is never getting is a radio or a sound system. I mean what's the point if you can't hear it over the wind-noise and exhaust and howling tires?
10) Yeah so, these are my ............ OPINIONS..
11) I mean I have a 68 Barracuda and these are the things that I did to it that made me happy, lol. Except being a heavier car, I started with a 360; and ended with a Commando/GVod and 65=2240.
And in stock, I have a small shed full of spare parts; cuz nothing is worse than having a years wages tied up in a car that you can't drive because a certain nearly-impossible-to-find-part, has failed..
Happy hotRodding