battery in trunk/rear right side leaning question

[LX XLR8R]

wiring is all done but where do most you put the battery..originally i wanted it to go over the passanger side tire but the car seems like it is leaning to that side way to much now(could be i have other stuff in trunk and or the front right tire wasnt aired up when i saw the right was sagging more on the rear)
i am using 4 banger spings but that should make no diffrence..could i of put the rear in cockeyed(i dint think it was possible)any help is good help..so let me air up the fronts and see if that makes a diffrence..just for refrence the right side had 1/4" and the left side about 3/4-1"..i think i just got to air up the fronts and put the battery in the middle but what do you think

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1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
AIM=onesillynotch