Its good to see someone looking into other options besides LS swap. You can get a lot of power out of the old engine just adding fuel injection system. IMHO Multi-port injection is the way to go for maximum power and efficiency. FI Tech kits are great kits, I know lots of people that have great results and have considered them myself. They are a throttle body set up and are going to be easier on your pocket book, the multi-port is going to cost more and be a little bit more and require and intake install.
What is your goal on the injection swap? One of the other users just purchased a Edelbrock multi-port injection kit if you want to read on the outcome.
http://67-72chevytrucks.com/vboard/s...d.php?t=772697