I FOUND THE BUILD SHEET FOR MY '71 CHEVELLE SS,BUT THE SHEET IS IN SUCH BAD SHAPE. THE MIDDLE OF THE SHEET IS MISSING, BUT YOU CAN STILL READ WERE IT LISTS THE 454 AND THE COWL HOOD.IS THERE ANOTHER # ON THE SHEET BESIDES THE VIN #,LIKE #'S ON THE TRIM TAG?

I have photos of a couple of 71 build sheets (http://www.chevellestuff.com/71velle/71_build.htm), One KC and one Baltimore. The numbers in the upper right block (24 I think) should match some on your trim tag - depending on the assembly plant.