I just starting an install on a VB&P Grand Touring Plus Kit as well as some other mods.  I considered the Performance Plus kit with the composite front spring, etc. But decided it was a little more kit than I needed.  I've heard it's a great kit and the ride is very close to a C5 if you have modern rubber.  My understanding is the kit is really about racing because of the adjustabilty it gives you.  While I might take an occasional trip down the 1/4 mile track or a lap or 2 on the road course I'm hardly a racer but I do drive farily hard on the road so I'm hoping at $1200 less the Grand Touring Plus Kit will be what I'm looking for.... which is good handling when I want to go fast and a comfortable ride when I want to cruise.  Oh, by the way, I'm also doing a Tremec TKO 500 5-speed conversion from a TH400, steeriods and new wheels and tires 17x 8 torq thrust II' s and though I haven't ordered the tires yet, I think I've decided on Sumitono HTR Z's in 245/45 17 front and 255/45 17 rear.  I already have a ZZ4 crate enginge in the car too.

 

Steve

I replaced both springs, Front and Rear, with the composite transverse mono spring.The front one is easy to replace. The car handles much better,is more stiff but is a good improvement. My Vette is a 1970 B/B.

The only disadvantage I noticed is driving on country roads where the pavement is not very smooth the car is a little jumpy.

Good luck

Carlosvette1970