New Suspension for the XR - differing opinions help?

[SVR73]

g'day guys

I'm thinking about lowering the front of my car 1/2 to 3/4 of an inch with either Eibach or Koni springs

some people I've spoken with say its not good to lower the car more than 1 inch because the rear IRS geometry will be changed and the rear camber will become more negative and chew the inside tyres out and then I gotta spend more money fitting camber/castor kits

then of course there is the ride quality. I dont want it to go south. its lovely as it is with standard tickford ride height but the whole car is sitting equal, not the front being lower than the rear
I want to give the front nose a drop so it gives the car a swoopier look

what are the original tickford spring and shock measurements?

If I decide to lower the front sooner rather than later, is it bad to leave the rear in standard form. can i get by with just doing the front without any problems later on
the car is up on the hoist right now in our race team HQ and I value your opinions
I dont want to get defected, have the ride become crap and make the stance worse than it already is

I am going to contact a suspension expert here in Adelaide who specialises in old school muscle and comes highly recommended for modern fords too.

as said above, my main concern is putting extra pressure on the IRS and screwing up its geometry by lowering it by 1 inch or more and chewing tyres. just for the sake of looks.

thanks guys, I value your opinions