Edelbrock SBC Performer Intake Manifold with EGR port 305, 350, 383, 400 - Looks Very Good. Not painted or gussied up so you can see what you are getting. I see no issues with the threads or otherwise.
Some generic data:
CHEVROLET 262-400 SMALL-BLOCK V8 PERFORMER - '86 & EARLIER (IDLE-5500 RPM) Designed for street 1955-86 small-block Chevys. Performers accept late-model choke, water neck, air-conditioning, alternator and H.E.I. Not for 1987 and later cast iron or Chevy Bowtie heads. Will fit 1987 and later stock aluminum heads.