These trucks actually respond very well to mild/bolt-on suspension upgrades. A few years back I did a 71 and it handled like a modern car, better than my 2003 Silverado for sure. I used several items from Early Classic Enterprises, unfortunately they are no longer open, they had some really nice components. The coilovers aren't a necessary thing, the shock doesn't know the difference, but they are nice for fine tuning ride height. The biggest improvement comes from getting away from the factory alignment specs. Shoot for a minimum of +4º Caster and about -.5º to -1º Camber and very minimal toe in, about 1/8" total, to start. If you already have aftermarket control arms, those should have some added Caster built in so it should be easy to get modern alignment specs with minimal shims. Any of the No-Limit stuff is good, Rob McGregor knows his stuff. Borgeson makes a quick ratio bolt-in power steering box for C10's, 12.7:1 I think. I had one from Early Classic and it really improved the steering, but... closed. In addition to getting a solid steering feel, you can upgrade to the Borgeson steering U-joints. You'll definately want a quality sway bar and spring "package". I say package because the rates between the bar and springs need to work together. I did the Hotchkis front and rear bars, front 2" drop springs and 2.5" drop spindle. Classic Performance Parts has a nice Modular spindle that can utilize factory style D52 calipers or also works with Wilwood Big Brake Kits. Best bang for the buck is the Wilwood D52 big bore replacement calipers. I did my own coilover conversion on the back so I could fine tune the rear ride height. Also invest in a good quality adjustable shock. Viking and RideTech have some great options. I did the RideTech single adjustable, but had Chris Smith from Smitty's Customs set me up with a custom set. It's been a while, but I think they had higher gas pressure for the front to help with compression because these trucks are so nose heavy. It was a night and day difference from the single adjustable QA1's I had on there. I actually re-used the factory lower control arms in the front and swapped out the uppers for the Hotchkis with the offset cross shaft. These aided in Camber gain as the suspension compressed and helped with turn in stability. I know it sounds like I had a Frankenstein but it worked very well for spirited road use and occasional autocross days. Here's a few pics of my setup as I was building it and as it sat when completed. Also check out 67-72chevytrucks.com, there's a ton of C10 specific threads over there with one called Make it Handle. Rob McGregor started that thread and it has a ton of useful info. Here's the link:
http://67-72chevytrucks.com/vboard/s...d.php?t=419251
Any questions I'd be happy to help!
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
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