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05-14-2022, 06:47 PM | #1 |
Senior Member
Join Date: Feb 2022
Location: Ca
Posts: 630
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Rack or new Box and Pivot Points
I have been thinking about this for some time and can’t come to a conclusion. Most comments I see on Rack and Pinion conversion kits are not enthusiastic. So the idea of a R&P kit has me questioning if the feel is there or just another aftermarket part to sell that has a $1000 placebo effect, and adds no real lift and possibly a lot of headache.
POL has a kit that they say will work on a C20 with disc brakes. Any one with first hand experience? Fitment? Net result? https://www.performanceonline.com/19...nd-pinion-kit/ My other option is to swap out all the pivot points and replace the currant 4.5 turn box with a 3 turn from Red Head. https://www.redheadsteeringgears.com...0Truck%20(2WD) This will stiffen the feel that is needed. I have gotten so use to racks I am missing the feel. Given we have the steering connections front of the axle line and everything I have read says aft of line gives the preferred feel. I am thinking I probably am chasing unobtanium. I think it was Richard Petty who would swap the knuckles on his race cars and flip everything around in the early 60s to get this setup. POL also has a set of control arms that is said to improve feel. Likely a caster push to the front I believe. That will improve centering force and wander. https://www.performanceonline.com/po...c20-c30-truck/ We have 50 year old hardware so I get it. I can’t help to chase improvements as advertised if they actually work. Any thoughts on these “upgrades”? |
05-16-2022, 11:10 AM | #2 |
Registered User
Join Date: Mar 2016
Location: Rochester Hills, Michigan
Posts: 23
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Re: Rack or new Box and Pivot Points
What modifications have you done to the truck? Unless you are racing the truck there are not a lot of changes that need to be made. Your tire choice will have a big impact on what choices you make on parts. I lowered mine and run 295/35/ZR19s on the front and was worried about the front tracking on cracks and ruts. I upgraded to 1 ton springs in the front to keep it firm. I replaced the control arm and links with Hotchkis parts and the spindles with McGaughys. It drives great. The only thing I did wrong was put too much caster into the alignment. I have -10/-10.5 and it makes the steering really heavy. I plan on reducing it to about -7 degrees and see how that goes.
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05-16-2022, 11:56 AM | #3 |
Senior Member
Join Date: Feb 2022
Location: Ca
Posts: 630
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Re: Rack or new Box and Pivot Points
That is a lot of caster on a heavy rig. No racing. I agree, when correctly restored these trucks travel quit nicely. It is why I asked the question. Given the lack of information on swap results, I think I will simply replace all the pivot points and steering box. It will feel like new again. I can put the savings into other improvements.
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05-18-2022, 01:17 PM | #4 |
Registered User
Join Date: Jan 2019
Location: Hampton Roads VA
Posts: 643
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Re: Rack or new Box and Pivot Points
Im debating the same issue. My biggest hang up is nolimit cant tell me for certain if the R&P will interfere with the stock sway bar (stock control arms). I feel like the R&P setup is better for the long haul but I don't want to have to buy a new sway bar etc to make it work.
Im not building a race truck or anything, just a nice c20 driver/tower, standard height. My plan is to get the engine/trans mounted and see clearances etc. Unfortunately that might be a few months out because the mounts/crossmember I want are not available..
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05-18-2022, 05:35 PM | #5 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,064
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Re: Rack or new Box and Pivot Points
Stock steering boxes have worked for 50+ years under these trucks.... I'd call that working for the long haul.
That being said, it's easy to make these trucks better. These mods make an improvement: *Increasing Caster (should be standard when wanting improvements). *Tighter steering via fresh Tie-Rods + a better ratio steering box (13:1 vs factory 16:1). *Better (current vs. 70's) alignment specs. Since a C20 was mentioned, while not a 67-72, the front suspension is basically the same under my Squarebody CC dually. It has the Caster mod, updated Redhead steering box, all new pivot joints, & cleaned + greased a-arm bushings. It drives like a 2wd sport truck w/o 'sport' tires (has Michelin LT's). Mine also benefits from a lower center of gravity but one can make nice improvements w/o lowering as well.
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