I've got a lot more to share about the project, but I'll just do it a little at a time. I have 100's of hours in researching this stuff and have lists of part numbers, etc. that I'll eventually post as well.

Back to the subject of throttle bodies, another option is to use the stock cable style throttle body (or a stock ported or aftermarket version) using either an adapter or an elbow. This is actually the better option for procharged or turbo applications.

A stock throttle body costs under $50 too...A ported stock throttle body can be had from $50-75 and even some aftermarket stock style throttle bodies can be had for under $100. Throttle body to 4150 intake elbows can be had under $100 as well. This option can greatly reduce the cost of an EFI conversion. For $150 you could have this part of the conversion covered.