i pull consistent 1.61-1.64 60's on my 26" m&h racemasters, and im going through the traps at 119@7000. but i would like to get my 60's down in the 1.55-1.57 range.
i been debating on installing solid motor mounts and solid diff bushing, and i think if i ditched the oem flywheel it may help too

oh and i pulled a few 1.68 60's on nitto nto5r's

 

I don't see how solid bushings will get you better traction out the hole, or do anything except break stuff sooner. A light flywheel is only going to hurt your 60 ft. Get better tires at the right temp and pressure and more practice. You might also consider playing with your suspension setup, toe/camber/rebound ect.

 

Solid bushings help as they reduce the extra movement in the diff (and driveshaft and tranny) that is permitted by the soft stock bushing. Any additional movement is energy lost (less power delivered to wheels/tires).

As for the flywheel, the heavy dual-mass flywheel we have from the factory definitely helps maintain momentum which is then transferred to forward movement. Lightweight flywheels do help in a sense that they are easier to get going due to less mass (but it's only helpful if you don't bog and if you can keep it from dropping revs).