Just curious if the reason the front gap looks to be too much for you is partly because the gap in the rear is much less than the front? So the car looks like it is running up hill? I could not find good enough pics in the earlier postings to check myself. Anyway, if so, that is probably because the rear springs has sagged over the last 45 years. Look closely at the stance of the NZ tiger in link in the Finally Brought It Back Home posting. That shows what a Tiger's stance looks like when new. Major gaps at front and back. How does your car currently compare to that one?
Does the rear end bottom out easily when driving over major bumps at speed? Especially with any weight of substance in the trunk? If so, you might look into getting new rear springs first. Then if the car sits too high for your personal tastes look into adjusting both front and back heights. Hopefully something in all of this is relevant at least to the context of your question! Cheers, Gene