Please don't come at me saying how TB spacers don't work and all that. Everyone has their own opinions and I'm not asking how you feel about them. I was was just wondering. There are two types of TB spacers made for my brother's truck. 1993 F-150, 5.0. There is an open type. Where as there is no material seperating the two holes in the TB. Then there is the split type. Which is designed to look exactly like the bottom of the TB. Which do you think would work better? Have more flow?