`70 383 road runner being biult as a nice driver/occasional strip car.I have a fairly mild combo- 9.5-1,torquer cam(don`t have specs here) To look stock I plan on running the stock intake and exhaust manifolds and factory equipped Holley 4160 carb.It has a 727 and 3.23 gears behind it but a gear swap for track days is easily done with the 8 3/4 rear.What I am looking for is how to modify the plenum area for my combo and are there any other mods I can do like gasket matching etc.Extrude hone is out due to budget.