I was wondering if anyone could help. I recently starting thinking about changing over to an electronic ignition. My question is what is the difference between XR700 Electronic Ignition System and PerTronix Ignition Kit and which is a better way for me to go. The two that I have seen are very similar in price so that is not a factor. thx in advance for your help.

Ease of installation : Pertronix for me.

An XR700 is going to be very hard to get and you might wait weeks to get the part. Crane cams is out of business and it might be complicated. Pertronix works just as well and is cheaper.

i was also told that i can use the components from a later 280z. would i get the same benefits from the 280z components as pertronix claims. the increased horse power and better fuel efficiency, etc...

You can use a dizzy from a 280ZX. If you can find one, make sure it has the E12-80 module and be sure to grab the mounting bracket and pedestal. This is the setup many of us are running. Do a search for 280Zx dizzy swap for more info.

If you have trouble finding on with the E12-80 module, I'm told you can do without it if you have an external elec ignition system like an MSD box. Basically the reluctor acts as a trigger for the MSD unit. I'm planning on trying this at some point myself.

there is a e12-80 module on ebay for 50bux.

You can also use the much less expensive GM HEI module on the Nissan L series electronic distributors.