Do a 4bbl.
Clifford or Offy intake
Holley 390 Or Edelbrock 500
Reason: As soon as you do the 2bbl conversion,your going to want more.
Been there done that.
This "was" a stock motor,that I ran a Cliffor intake/header with a Ede 500. Ran good,with a little tunning.
Now it has a Erson cam,shaved & ported head,with over size valves,
340 springs.Should run really good now.8)
JD.