Indy sells sm blk heads for around $499. They are all ready to go with 1.88 / 1.60 valves. Pocket port them and mill them and bolt them on. Dump the 2brl for a TQ. Find a 9 1/4" diff from a 75-9 Cordoba ( or truck as mentioned ). There are still plenty in the bone yards, many with 3.23 gears. Check with Hughes on a cam, but I would go with a HEH1019AL - or the 1523 if you can run a 3.55 gear. Cheap headers and dual 2 1/4" exhaust would be nice. Easy 14 second car with those mods.