Fuel Injection

I have been gathering research on the future fuel injection system for the 440. I am going to use a GM Throttle body with a purchased adapter plate. I could make one, but I can get the plate, gaskets, hardware for $46, so it is worth the time savings. I have learned that I should not use the throttle body from a small bock Chevy, but one from a big block 454 and maybe even bore it out to 54mm for more torque. http://www.affordable-fuel-injection.com sells an almost all inclusive system for about $1600. Hmm Looks like the DIY route is the way to go, can do it for a lot less, but need to get the 454 T-body first....