Thanks guys, heaps of options to get me started! Looking to get exhaust manifold or adapter done if I keep the stocky to suit an external wastegate setup rerouted to dump pipe. Playing around with retaining twinscroll but I want to run a single wastegate, so it depends if a good solution to keeping the pulses separated can be found. I'm thinking something like this:
combined with an adapter like this if I don't get the manifold: