258 build

ok,I like oddball stuff(Ask Cosmicfrog).I am building a 258 and needing some pointers.I know it will get a set of Clifford tube headers,4bbl carb,Not sure if I want to go with 4.2 or 4.0HO head yet.Thinking of going with an Isky cam(We use them and love them in our 2.5L dirt track pinto) with the following specs.

RPM-Range (2500-6500)
 Valve Lift (.467 .467)
 Valve Lash hot(.000 .000)
 ADV. Duration (282 282)
 .05 Duration (224 224) LC 109
http://www.iskycams.com/Wcc278cf4ad5a.htm

Any ideas on the head,Rods,Pistons(want to run on pump gas,will be driven on the street some,Drag strip on test and tune night,car shows,etc).Oh yea,727 transmission.Thanks guys.

PS,the reason for the agressive cam pick.I want it to sound wicked!But I am thinking it may be way to agressive.