HoLeeChit,
I'm not able to give you precise answers to your questions but I can share my experiences and make recommendations. Your plan to run 33's changes the game and I believe your suspension budget of $2,000.00 dollars is a little lite to set up a proper system that you'll be happy with, around that size tire. Spending a few more bucks on quality products and installing the correct lift the first go around will save you money in the long run. Been there, done that.
When I purchased my Cruiser I spent many hours researching and with pen and paper mapped out my build around 33/12.5's. Since the Cruiser was going to be my daily driver, my goal was to create a lifted vehicle that rode like a Cadillac but handled like a sports car both on and off pavement. An unrealistic goal as there are always trade offs.
I chose a full stage, 3 inch "Icon" system to include their adjustable delta joint UCA's, performed the BMC and pinch weld fold, installed the differential drop kit, sway bar relocation brackets and adjustable sway bar links. Even though I was running aftermarket wheels with negative off-set to push the tires out, I still experienced tire rubbing with the 33/12.5's and had to add wheel spacers. The Icon system performed well in rough terrain but I was not happy with the performance on pavement. Every small crack and bump in the pavement was transmitted into the cabin, in part due to running "E" rated tires and cranking the Icons to their full preload (Height). The rear of the Cruiser was stiff and rode harshly. I experimented with different rear spring and shock combinations but was not able to achieve my desired ride quality. I eventually removed and sold the Icon's. Installed Bilstein's, lowered the vehicle to just a hair over 2.5 inches in front, 1 inch in the rear, and now run 285/70's. My current setup provides very comfortable ride quality and handling characteristics on pavement with moderate off-road capabilities.
To answer a couple of your questions:
-All adjustable struts will increase in stiffness as more preload is added to the springs. Having said that, the 6112's are fairly soft and forgiving and I don't believe setting them to full preload will cause them to become overly stiff. Bilstein offers a stiffer spring for the 6112's for vehicles that have added weight such as a steel bumper or a wench.
-There are several brands of springs on the market that can be used with the 6112's but this will add to your budget and in my opinion not necessary. Attached are links to a California company "Shock Surplus". In their YouTube channel you'll find many videos comparing different shock brands to each other. Very useful information. They can also provide you with advice if you give them a call. Their number can be found on their website, second link.
Shock Surplus provides the most extensive catalog of ride control products in the United States. We have a shock absorber for every vehicle on the road today, whether that's for stock and factory replacement, performance passenger cars at the track, or offroad vehicles in the toughest terrain.
www.shocksurplus.com
My advice for you is not to be in a hurry to modify your Cruiser. The more time you spend researching and planning will yield better results. Make a detailed written project plan identifying your goal and all parts and modifications required. Be advised that many aftermarket upper control arms are not compatible with stock rims as the rims do not have the required off-set and will cause the sidewalls of the tires to rub against the UCA's. An issue to note in your project plan. If you decide to perform a full 3 inch front lift I highly recommend the differential drop kit to lessen the angle on the CV joints. Additionally, you don't have to perform all the modifications at once. Do the BMC and pinch weld fold first and have it completed prior to deciding on a suspension system.
Attached is a photo of my Cruiser for your reference. As I stated I went from a 3 inch Icon lift and 33's to Bilstein's, roughly 2.5 inches in front and 1 inch in the rear and now run 285/70 17's. JBA upper control arms, BMC, Diff drop, and adjustable panhard bar to center the rear axle. Alignment is spot-on, I have plenty of tire clearance, and the vehicle rides and handles like a dream. Much better than what I experienced with the 3 inch Icon's and 33's.
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