I need a set of drag only front springs also!! Please post what you find out,I've been looking for some time with no luck also!I'm running the stock BB springs now,but could use better weight transfer,I use very narrow tires,(stock G-70-15 firestones)in the F.A.S.T drag racing class.I need all the traction I can get!!
Wayne Nelson

 

Damn!! I'd smoke the G-70-15's to the 1/8 mile!!

I'm running 28 x 13.5 -15 ET Street slicks in the rear...

 

The Camaro springs are about 3" too long for your Vette. The Moroso springs work really well and you could cut them down. The reason the springs are too long iss the shallow upper spring pocket that allows the low hoodline on the Vette. I would go ahead and cut 2" off a set of Moroso springs, install them, see where they are and modify from there. You will want soft 90-10 "Up-lock" front shocks (I just threw out a set of Gabriel Drag shocks that would have worked for you, sorry.) The rear shocks should be stiff to help "plant" the tires and you need to make sure your halfshafts will never hit the frame or the rear trailing-arms never bottom on the stops or BAD! things will happen to the half-shafts (the half-shaft will "kick-out" of the center section and "take-out" the rear quarter panel.) You may want to install the "Drag Vette" pieces on you car for saftey. Taking a IRS Vette into the low 11 second and quicker zone is something to be approached with caution. I think you said you bought a Tom's Differentials 12 bolt IRS assembly, good luck with your efforts! I'll keep my Vette at 12.00 seconds and slower to avoid the NHRA manditory rollcage installation.

 

I have often posted that I ran morosso drag spring for years with a 280 pound rating. That is what I pulled out last winter when I installed coil overs. I also ran 90/10 shocks. The combination of long travel soft springs and 90/20 shocks or 80/20 in your case case a handling problem on launch.
Remember me constantly complaining about bump steer. With your combination you are going to run into it big time.
On launch the front end rises alot, the tire toe in alot, maybe well over an inch and the car goes left or right because whenever tire has the most wieght on it steers in that direction.
It is a very dangerous combination to try and keep straight.
You want to drag race and yet avoid alot of the intricate detail needed to make a car run well.
To be successful at anything you need to a feel for what the car is telling you, a sixth sense and whether your baby is running to the best of her ability or not.
I posted alot on launch problems years ago but after getting rid of bump the car came out straight and true.
You would be better with your heavy springs and normal shocks to avaid running into this dreaded bump.
Anyway morroso make a couple of differenct choices in soft springs for our car but they are all 19 inches long to begin with and they expect you to cut them to the desired length,

 

You can't torch springs to make them softer, All you are doing is taking the temper out of springs rendering them dead or once they settle under the weight of the car they are permanently deformed to this shorter length.

Another thing Grand sport is shocks to do affect ride height, your car can not sit too high because of shocks. Sure the 90/20 shocks hold the front end up longer but it eventually settles down to whatever height the springs have decided upon. The shocks have no say in this final ride height.

 

I do have Competition engineering adjustable 90/10's in front (set to 80/20 right now). My rear suspension is very stiff (550 lbs/inch spring), so I doubt that I'll bottom out at all. I do have a 6-point rollbar and I'm legal to 10.00 with the car (with the hardtop on)...

 

hmmmm. do you have a part number?

 

So why would the car sit over an inch higher with '65 small block springs than it did with the 460 coils??

 

More than likely a combination of spring length and spring rate. Just an added note: when you shorten a coil spring you also increase it's spring rate.