I found a low cost alternative TBI. I met a guy at the junkyard today from Columbus GA. He has a website
GM fuel injection
He claims one of the first cars he injected was a 68 lemans with a Pontiac 350. He sells a system for around 950. He also offers a book that tells how to do it yourself for $30. He told me it can be done with junkyard parts for around $350. Not port injection but well worth the cost.
69Firebird roundport/roller455
70Catalina 455
72Skylark Buick 455
89 Iroc 305 stock 192RWHP/263RWTQ
I cant leave anything alone.