Old Z's make great custom bikes , lots fun to build and great riders.
Here is a couple that I have played with
Ron's Zmonster
125 cc engine , new hyd front forks , 3" added to swing arm , larger rear shocks
My Zbobber
90cc engine , spring seat , cruiser bars , 3" added to swing arm
Need to take a finished picture lol but here it is during const.
Hope you decide to build one , love to see another project log.