If you were to move the wiring harnesses out of the way,it might give you what,about a 1/2-3/4" more clearance behind the upper part of the radiator,but will the bottom of the radiator still be too close to the pulley??
I know most guys dont like running one,but have you entertained the idea of a flexfan?? Several spacers(varying in size)are available that might put the fan where its needed.You could take some measurements,from the water pump pulley outward,to see if one of them will make it feasible.
I ran one when I had a Kenne Bell on my LX,but I cant remember what size radiator was installed at the time,as far as thickness goes.
Ive been running the same one on my 331 for 6 years now (up to 7000rpm) with zero issues.
Im not sure how it compares(cooling wise)to an electric fan,considering my LX never had one,but it cools much better than the clutch fan setup(stays between 180-210° ac on,in traffic,180° tstat) its lighter & its inexpensive.
Be careful when youre installing or working close to it though,because it will cut a helluva slash in your *** if youre not paying attention. lol.
Just thought I'd mention it as an option(maybe)
BTW- it sounds like youve got enough of them (rad) lying around to start your own radiator shop.lol
91 LX 342ci (10.5:1)
TFS 190cc (stage ll)
GT40 (tubular) intake
Weld ProStar XP's