Listed as Small block and Big Block with AC coil, it actually has the Moog part # in it (5762-36832)! I find it hard to believe that Moog 5762 just happens to be Wilcox's part # too.
I see more vendors "sharing" (GT) Grand Touring Springs 460lb springs- these are probably being made by one vendor, which is either: 1) direct shipped from the manufacturer, or 2) stocked by "competing" vendors (w/ a markup, of course).
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
I just did a little surfing and couldn't find a vendor offering anything besides a 460# or a 550# spring...if you have all the factory equipment in the front - big block, A/C, etc, the car might sit and ride a little low with the 460# spring.
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Vette(s): Coupe 74 - 454
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I had the same question when I bought... (74 big block also with A/C).
I ended up buying from VB&P; the Grand Touring Plus Kit; which comes with a 460lbs coil.
Before making the purchase; I called them to validate my concern about weight. Since I don`t drag or race... he said I would be just fine with this kit. A lot of people fine the higher rated kits a little hard.
Something else that could make a difference is your tires. I chose to stay on 15" instead of 16 or 17; so it cushion`s the ride.
I wish I could tell you how it ended up; but I`m starting the installation next month... However, from my phone conversation with them; I really feel I made the right choice by not going with a "big block kit". I felt the specs were a little too stiff for me and for how I like to ride.
I was also concerned about the ride height. The vendor said that since I`m still on the original coil; they are already a little lower because of age. Just the fact of going with new coil; should bring it up a tad and the end result should "feel" normal.
Definitely feels like the market is majority for small blocks (I get that). There seems to be only a limited # of coil springs for big block cars in general, let alone with the AC option.
You try to be as thorough as possible, do your own homework/research to make sure you're well informed (and the part is correct)... and there's still questions. With car resto's, that seems to always be the case.
I'm not going the "correct" route, even though I could get an "exact" spring. Yes, today's springs are made shorter so they are somewhat easier to install. A shorter spring with larger diameter coils will provide a more flat ride, a good move in the handling dept.
Manufacturers seem to miss the mark on these simple areas- Corvette coil springs. Obviously I see why- you only need two for the front. Still, I come from a retail business side, and all vendors really ought to market these things more appropriately. In other words, truly sell what they really are selling. Being vague just makes most people skip the purchase- that goes with any part.
I feel my springs are shot, even with coil spring helpers in the front. 550lb springs with a big block isn't a bad idea, but I'd rather not be so stiff.
And this coming from a guy who's '69 Malibu had a full Hotchkis suspension, including 2" drop progressive rate coils and KYB's. Very stiff ride with a small block.
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