wheel adaptor/spacer help

[foxz]

Hello there, i have a 78 malibu, and im tring to fit a 18 x 8.5 replica vette wheel, the dished type. The Back space on it is 6.56" front. Did some reaserch and ppl have run 4.5 BS on a 8 inch rim fine had some problems with a lowerd car and 4 inch bs but rolled fender solved the problem. I need to know what size adaptors id need for this wheel. thanks

[Bow Tie 67]

If I'm reading it correctly just subtract 4.5 from 6.56 for 2.06 spacer.

[foxz]

thats what i was thinking lol but i wanted to make sure before i dont do something right lol

[foxz]

iu was thinking going with a 2.25 if they make them and roll the lip