CUSTOM NEW  ZL1  427  VINTAGE  BUILT  3946052 , BLK, 3946074, CYL Heads, #198 intake  nos oil  pan, cam & kit  7/16 forged rods, pistons, balancer,  ,deep groove pulleys , TI  ing, 2604176566 FOR DYNO SHEET & BLUEPRINT SPECS,  ONLY 1 LEFT ....