Talked to Edelbrocks tech department yesterday, when you use thier MPFI manifold you use the stock throttle body. Specs say it is 1 and 5/16" higher than stock, so far so good. I was having a slight problem with the Proform case fitting all the way around (it was hitting the MAP sensor) which is on a angled bracket, just bend it back he says, why the hell didn't I think of that, stupid Pindar. I ask him about the fender ram tube, because I'm taking it off, I want more air flow to the MPFI. Then he tells me to get more stock throttle body GASKETS and glue them together to raise the height of the throttle body. Hmmmm, now this is getting very interesting. I can't wait to get this together. Raising the throttle higher brings in more air. So the filter should keep up with higher air flow.
I wanna see what happens when the whole system comes together, lets take this '91 Sierra to the track, wheeeeeeeeeeee.
Pindar