Building a 340 6 pack 67 Barracuda with 4 speed and 8 3/4 4.10 posi rear. 340 has been bored .030, decked, new cam bearings, freeze plugs etc. 10:1 pistons with stock bottom end (steel crank turned on rods and mains). Has factory x heads that need to be redone, or new Eddy's or something else...