The E0AE block went into production in late 79. The casting numbers are located behind and below the starter. The casting numbers for the pre 1980's blocks are above the starter. Hopefully you'll have a D8VE block there instead of the 1980-up block. The D8VE castings are the same as the 289 blocks as far as weight goes, the bonus to look for is the D8VE-A3A casting, this one's got the 289 Hi-po/Mexican block main caps. The 3A suffix block will have the std main caps.