I honestly think your cheapest option is a Cmdr950 StealthRam system. The StealthRam is the better intake vs Holley's traditional singleplance MPFI, although will show slight differnces in the cyl to cyl air distribution vs the singleplane but, nothing to wory about. The singleplane intake w/ 4 hole billet TB is better option by replacing w/ elbow/monoblade and I spend some time porting it as well). Which makes it not very cost effective and not the best singleplane manifold choice.
I prefer the singleplane (Holley Dorton or Victor EFI) w/ elbow as I feel they offer better airflow distribution but, you need to mix and match peices and it will be more expensive vs a kit I listed above.
I have my hand on a few of these systems if you need one, I may have one to fit your application. And FWIW, I did something very similar many years ago with details followed below
http://www.geocities.com/64duece/procharged355.html