ride height

My 77 280Z seems to sit higher in the front (nose up in the air).

Car was disassembled and 90% put back together by someone else.

I don't know if the front is too high or if the back has been lowered.

It has stock steel rims and hubcabs with standard size tires.

I've measured 66.5cm to the inside of the wheel arch in the rear and 71cm in the front.

Does any one have any idea what the original numbers would be?

I'd like to bring the front down but don't know if I need stock springs or shorter one?

Any info would be appreciated. Thanks