Drag pack fitment?

[03Terminator&2020S550]

Any of you running 315/50/17 tires on stock hight S550 I have a 2020 gt want the traction its making over 800whp roush charged. They are weld S71 beadlocks 17x10.5 buying used has brand new mickey thompson drag radials on it so if not what size spacer do I need 1/2 inch? The guy selling them said they fit his S550 factory ride hight they just stuck out about 3/4 of an in on his car only seen photos of them on his car I know 305/45/17 works but Idw waste these beautiful tires lol any help would be greatly appreciated before I purchase this weekend!
Photo of the old owner proof they did fit attached.

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