The Corvettes 92-96 and camaro/firebirds 93/97 had aluminum heads--engines are reverse cooling---Buick, caprice, caddie had iron heads---we built probably 30 of them last year and get core blocks from core supplier, install billet angle bolt 4 bolt main caps, Callies or Scat forged stroker cranks----
the blocks are getting scarser to get as the dollars for junkers pretty well did in that era of cars no matter what the make was---

what do you plan on putting it in and how do you want to drive it????cruizer ecomy or strip?