hi guys 416 - 318 poly swap 56 Savoy

im doing a relatively simple swap
416 stroker 340 / 727
into 56 Savoy that was
318 poly / powerflite 2 sp

my question is ---
has anyone done this and / or can anyone recommend out ofvthe box headers for this combo
the trans linkage will prob be replaced with lokar for clearence as well as a mini starter

thanks guys
direct reply ok..