ZL-1 Camaro engine casting dates

[berger]

thanks I see what your looking for the early ones, theirs a pic on pg 16 of a can am next to a reynolds high silicon 390 alloy ass used in the vega engines it states, it has a cast number on back of can am block and something on the vin pad, but its gonna be tough to pull them even w/ glass but I 'll give it a try if it helps, I can give you some specs on the reynolds if you don't have same book, its only about a half page but its inregards to mclaren 's setup and in 72 chevy started marketing a 390 aluminum alloy block, half the cost of a linered block in 71.