Hey all, I’ve tried search function but couldn’t find answers I was looking for.

I have an 81’ ghia with the 200ci straight 6. I wanna keep the straight 6 but I hate the casted in intake manifold and the stock exhaust manifold. I have been looking for different head options that would allow an aftermarket intake manifold and larger carb, as well as tubular headers. Looking for ideas on what kind of head I could swap on?

I’ve found some split tubular headers online that would possibly allow me to ditch the stock exhaust manifold and go dual exhaust, but they say they’re for the mercury capri with the same engine but not the mustang. Unsure why they wouldn’t fit on a mustang since they seem to be the same car… This wouldn’t solve the intake manifold problem but at least would be a step in the direction I’m trying to go.