I just picked up a 88 sami that has no keys and it has push button ignition.
Ive seen a bunch of write ups on this, Is there a reason a bunch of you switch over to a push button from key start?
Im asking because I would like to get a new ignition(and key) for it so that no one but me can start it.

Thanks,
-Lostj

Sure, it's easy to do. 

The main reason is probably the clicky starter fix.  You can just run a new wire bypassing your entire old ignition system.  It also makes it easier to run your starter when inching up obsticles because your engine died. 

you can just get a keyed disconnect switch
  i like push button starts i had one in my chevy. its cool and for me when it stalled i can quickly just press the button to start her back up
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=92688


http://www.wiringproducts.com/index1.html?lang=en-us&target=d35.html&gclid=CJiDkrXG15YCFQOIFQodEx9K3A



heres a place with a bunch of key ign switchs
http://haywireinc.com/catalog/index.php?cPath=5_6&osCsid=u1mhmvu0n5hugl6kvm1k4ppt95