Lou,
The Vette chassis is very heavy and the floor will require a fgrp tub to fit the chassis, again adding weight.
Just stuff a Chevy in any of the many available roadsters out there, it's kinda nostalgic, since quiet a few of the originals received 327's/350's since the era speed parts allowed that sb to hang with the COBRA 428/427 street cars.
As their value rose the Chevy powerplants were quietly replaced with "original" engines.
grumpy
ps, their new site
www.hunterscobrakits.homestead.com/