So these came in a 70 GS350 I bought as a roller. It had 455 frame mounts so I assume it had a BBB. I will be putting a 455 in it with no A/C and aluminum intake with stock exhaust manifolds so it won't be as heavy as a 455 with A/C a and iron intake. I always felt these cars needed a an inch or 2 drop in the front.... I was thinking of blasting and having these powder coated with the suspension parts.... do they look like 350 or 455 springs? They appear to be right around 15.5 inches tall. I am also wondering if 350 springs would make the stance just a touch shorter in the front?
Measure the diameter of the coil (wire diameter). That will help ID the spring. Thicker wire produces a stiffer spring rate, which is a better way to determine how much weight it can handle and how it will drive.
You can do all the research you want, measure height and wire diameter but in the end, the only real way to know is put them in and see.
I would install those, and see if you like the height, you MAY be happy with it! And you’ll be happier knowing you didn’t spend money on springs that made you unhappy. The 455 is not much heavier than the 350, even 200 lbs ( if it is) is only 100 lbs per spring, and that won’t mean a whole lot to those
The springs should have the part number stamped into them. The part number on Moog springs is at the top of the spring the last coil on the outer edge.
