I was going to fix up Stevens old set of headers but now leaning towards a complete custome system on my 454 Suburban.
They sell a seto of P30 headers that are a Tri-Y design. I have found a couple people that have used them and been very happy. I just have to make sure they can add in the O2Sensor bung.
I have a guy in AL that sells a Mandral bent X pipe arangement then into a pair of 50 series or Delta Flows.
It would be nothing to lenghten this system for a MH.