Hey mike I just finished porting my exhaust manifold. I did the flange on both sides but only half the flange only where exhaust flow would go from larger to smaller. And not where it would just go small, larger, small. Then on my runners i removed some like 1/12"-1/8" off of the number 1,2,5,6 runners where the bolts go. Then on the turbo matched the flange and opened the downpipe are up alittle and angled the wastegate wall so its alittle smoother. Your welcome to come by and look at what i've done.