Late 60's/early 70's look

Ah, I love old school looking cars!
Here is some of the popular trends from back in the 60's, 70's and early 80's in Northern California
The Diamond pattern interior was called Diamond tuck interior. like was said the chain wheels were for the Low Riders, the High Riders (muscle cars) had the grant type steering wheels with the three holes.
Fiberglass racing seats in the front with 3" wide Racing seat belts.
White headers and blown out glass packs or side pipes.
Candy color paint jobs, spider web engine compartments and trunks
Foot gas peddle and high beam switch.

Sun tach with a garder around it.
One of those cop spotter rear view mirrors that goes all the way across the windshield. ( It made it really hard for the cops to try to sneak up behind ya in your blind spot heh)
The brand or model of your car across the top half of your windshield.
Brand stickers on your rear windows like B&M, Hi Jacker, Holley, STP etc

Traction bars until you realized mopars don't use them and you get an adjustable snubber. And it works better when your trying to talk the guy with the Camaro into racing you by saying hey I don't even have traction bars, and you have a 350 and I only have a little 340 LOL
A tunnel ram with velocity stacks sticking through the hood or at least a 5"- 7" hood scoop
Pin striping on the car or a Mural on the trunk, on the hood scoop, just somewhere.

Moroso gold valve covers or M/T valve covers with T handles.
Fire extinguisher preferably chrome mounted somewhere inside. Between the seats was popular if you didn't have a console. Some even mounted it on the door of the console, under the dash on the passenger side, or tucked up under the front of the drivers seat.
Accel super coil because it's huge, plastic and yellow! Great coil
Hi Jacker air shocks, but you could probably get the same look from some SS springs now.

The Fattest tires you can cram in the back,15x10's with N-50-15's and 14x10's with N-50-14's were popular with white letters showing. Small chrome mud flaps because your tires were too damn wide and they keep throwing up rocks and chipping your paint. heh
Rims- Cragars, slots, Keystones, flower mags, Centerlines.
Fog lights behind the grill or below the bumper.