I have a '68 Chevelle and want to keep the car streetable but want to improve my 60' times so I thought I'd get some Comp Engineering 3-way adjustable shocks. Anyone know how much the ride quality will suffer much with these?

Thanks....

ive got summit brand 3 way adjustable shocks on the rear of my 66 chevelle. they really dont feel any different than the gas shocks that were on there before.