just to let you know ,, friend of mine put set on 67 coronet
it was a little more invovled than just abolt on deal
as for any diffrence in 60 no ,, ran same 60 actually lost a bit !!
over the super stocks,,
he did build a bigger motor to and looser converter,still ran about the same as ss
as for the 'tunabiltiy' of the bars yes it can be done
but not easy,, have to have drivers weight in car to adjust very hard to do on the ground
so for my oppinon never buy again what a waste
for the monie just put ladder set up
either float it or coil it !!