Before being able to answer the question accurately enough, it would be nice to know how the car has been 60 ft'ing and what your goals are.
My faster car has an H&R bar with no front sway bar and I've been able to get 1.4s on it as a 10 sec car and was able to get consistent 1.5s on it when it was a mid to high 11 sec car.
My clone and GN (mid to high 11sec cars) both have stock front and rear sway bars but have upgraded poly bushings in the upper and lower rear control arms. The clone had boxed lcas while the GN has stock lca's. I was able to get low 1.6s and a 1.5 on the GN. With the the clone on a transbrake I seem to be stuck in the mid 1.6s. This may be more with the tune though and I will try some more things before saying it can't 60ft better. Slicks may help too as all the passes on all the cars have been on MT drag radials.
Before upgrading to an H&R bar I would at least upgrade the bushings in the uca's, including the ears on the rear end. I would also get your 60ft into the 1.6s before worrying about an H&R bar. If you can't do 1.6s than you probably have other issues (tune, launch technique, tires, etc).