1977 (early) 280Z cold air, XR 700 optical ignition, urethane bushing kit, tokico illuminas and springs (all4), some other stuff i'm forgetting Haven't been on the forums in a while and saw posts about the Petronix. (still researching but getting there) There was a post in the HelpMe section where a user said he switched from the XR700 to the Petronix. I have the XR700 and it works. My issue is it's nearly impossible to tell if my timing is actually accurate due to how the whole thing gets installed. Is the Petronix any better? Should i do the 79ZX Dizzy instead. Megasquirt with fire is not in the budget for another year or two, so it's not an option. Opinions? I'ver heard lots of debate about Petronix vs. points (the other site, current posting) but none really about XR700 vs Petronix. Thanks in advance