The Howards cam you can get through Competitionproducts.com or better phone number 1800 299 0199.
The rotating kit that will last alot onger than a stock bottom end without breaking the bank you can find it on ebay through Skip white performance
for $849 plus $59 shipping that includeds a Scat 9000 crank.Forged flat top pistons,h-beam rods,all bearings,balancer,flexplate and all comes already balanced ready to assemble this kit is externallt balanced and have used these same kits and support 540HP without problems. I've used several at 520HP to 560HP. Good Stuff.
Phone number 1-423-722-5152 or 1-877-383-5152
Here is the link to the ad
http://www.ebay.com/itm/SBC-CHEVY-SC...item519f1f8392
@30 over will give 11:1 compression he has a dish piston kit to give you a more friendly 9.5:1 compression.
You'll have to put at least $350 in labor for the heads from milling to install hard seats, install screw in studs with guide plates.
I'd get a set of RHS or Dart heads that already the hard shit done already
to save on cost and get more power. On a RHS 200 head with a mild H-roller will get you in the 500-510HP and 490tq or a Dart head will work fine as well.
Let me know what you think.