Tucking 20's on a caprice?

What width and backspace will i need to tuck 20's on my 91 caprice?? I am going to start shopping for wheels here soon because i got my income tax return.

Anyone got some ideas for wheels also? I have no idea what kind of wheels are even out there anymore, its been sooooo long since i have even looked.

Thanks in advance!

Bump

5 to 5.5" of backspace on a 20x8.5" will tuck very nicely on a skirted caprice.

they are the exact same as a 88-99 full size chevy truck , 5x5 w a 4 1/2 in back spacing

bagged? static drop? layin frame?