i dont post much on here, but i figured i should post this. i wrecked my 3400 plenum being careless when bolting it down and ended up cracking the mounting ends off, and so i just jb welded it for the time being, and i started to look for a 3500 UIM. i got one pretty cheap and picked up a 1998 4.3 vortec tb dirt cheap and started to think of ways to mate them together and this is what i came up with. excuse the sloppy vacuum lines... i dont have any pix of the UIM finished porting either... the top end difference it made is amazing! it really compliments my headers and porting.









Comment