Hey guys I have a 77 280z and I was wondering what is the highest compression ratio that can be run with the stock efi system? 
 

looked online there is a lot of information but nothing specific to the stock efi that I’ve seen. 

11 hours ago, 280zdude said:

Another question should I replace the head gasket as a maintenance item or should it be ok? I have almost everything off and I’m replacing the timing chain and all the gaskets around the car..  

Never reuse a HG unless it is one of the steel aftermarket HG's.

4 hours ago, dutchzcarguy said:

If your headgasket is old ofcourse put a new one on, your doing all the gaskets but not the most important one? 😟

I read that there are people that reuse a headgasket???  After i take apart a engine i ALWAYS use a new headgasket..  I think that is the only way to go..

I’ve never done it before lol but it seems simple enough. Do I need to resurface the head I’ve read in forms people tell others to do all these things 

18 hours ago, 280zdude said:

Do I need to resurface the head I’ve read in forms people tell others to do

When the head is off, you have to check if everything is strait as an arrow.. use a ruler and some feeler gauge.. (or shine a light under the ruler and look for light on the other side )  Reading about how it's done is always good.. Also many vid's on youtube about it.

A framing square works good too. Long side against the bottom of the head.