Originally Posted by Conanski

5.8 truck uses the same TB as the 5.0 truck and I'm pretty sure they're 52mm but I'll have to check that. Either way your chart clearly demonstrates how rediculously oversized these things are and also how completely unnecessary an even larger throttlebody is on one of these motors.
The 5.8 Lightning uses a totally different intake.. the GT40.. which has a single TB and I don't know what size the TB is but I'd be surprised if was more than 65mm.