Does the sway bar feed thru the body as typical for a OEM 914??
Have the torsion bars been upgraded in size???
what are the weight variances between front and rear with the conversion?
Horse power is a big factor...a 'mushy stock ride'..
could equal an accident......
what is tire and wheel Size??
your current HP will not work well with stock or close to stock size
tires.....that is a Huge factor to get that original ride..
find a putt putt 1.7 for a grocery getter.
and leave the Suby for your mad power days..!!
there has to be a balance between front and rear.
if not the car can turn into a bucking horse..
Since this is the Originality forum...
I would throw this over to the 'Garage Section'..
and let the Suby folks dissect it..
Good Luck..Rx