One of only two Corvette ZR2 convertibles built heads to auction

A rare 1971 Chevrolet Corvette ZR2 convertible, one of only two ever made, will cross the block at Mecum’s Indianapolis auction this May, and it’s expected to draw a seven-figure bid. Quietly introduced as the successor to the race-bred L88 Corvette, the RPO ZR2 Special Purpose LS6 Engine Package (to use its full name) equipped the C3 Corvette…