Originally Posted by bigblockford79
88 and newer will work, except vortec as previously stated. The 87 and older heads are also slightly different where the intake manifold mounts and therefore will not be a direct replacement.
Try contacting engine machine shops in your area, sometimes those places have common heads on the shelf ready to go for a good price.
Pretty much any TBI head will work. the biggest diff was in `86 when the carbs were phased out. if you use an older head the center two bolt on the intake on each side don't fit right.