Not spacers. Adapters. Spacers should only be used in width's under 1/4". Adapters can be had in much larger sizes (I run 2.25" adpaters on my 2nd gen with Z06 wheels). They bolt onto the stock studs and have their own set of studs that the wheels bolt to. I get mine from
www.wheeladapters.com. Make sure they clear your stock hubs/axle flanges and that they have a wheelcentric lip machined on them to center the wheel properly (70.3mm is the center hole IIRC). They'll run you about $300 bucks for a set of 4.
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'81 Sport Coupe 229 V6 -Junked
'93 Z28 LT1 - Parting out
"Is that a rat? No, it's just a really fat mouse."