thank's dimlight, I must have a non-original diff in there because there is definately a cover on it...lol. guess I'll have to take a closer look at it. thanks anyway.

Does anyone know where I can get a chrome diff cover for my 73 coupe? I really appreciate any info...

does anyone know what the torque should be on the headbolts for a 73 A-12? gotta put this head on tomorrow and I'm stuck. thanks.

hey bro, I've seen this several times as a nissan tech,and it sure sounds like you have a bad rear u-joint.when you let off the throttle, this releases the torque on the drive line causing it to snap back.noises can be the most difficult to diagnose but I would start with the drive line.
hope this helps.

Ok, I just found out that a dual carb manifold for my car cost about 600 bucks(ouch). my question is...is it worth it? what kind of power increase are we talking about? Any comment is appreciated.thanks

Thanks for the info bro, I'll check that out this week. I just found out I blew a head gasket so I'll have to take care of that first. thanks.

I'm looking for a dual carb manifold for my 73 1200 coupe (A12). Does anyone know the best place to get one in the states? Any information would be greatly appreciated.