[markjohnson]

A 1967 L-88 would be a #351, a 1968 would be #321, 1969 would be #512. Crate L-88's would have been a #512 block also from 1969 until 1971. Then 1972 and up crate L-88's used the #289 block until the late '70's when the introduction of the #445 block appeared until the L-88's demise in the early-to-mid Eighties. Also, back to the '68-'69 Vettes.....there was some bleeding over on the blocks near the ends of the actual production years, so it was possible to have "next years" block in last years 'Vette.