I have a 4.3 vortec and need some parts.
A regular internet search hasn't revealed much.
I need:
Headers
Camsahft - 210 duration or around that
Lifters/ valves/ pushrods
and a crankshaft...
So far I haven't gotten any sites that sell much, or any at all.
So if anyone has a good parts supplier, I'd appreciate a link

Thanks

 

Check Summit Racing. Great company, great products, I saw headers for your truck on their site. They are about 10 minutes away from me. I have bought lots of stuff for my cars there. They have just about anything you need for a car or truck there.

 

*Moved to General Tech*

Headers, see above...

For the cam, check out Crane Cams or Comp Cams which both should have cam applications to meet your requirement. You should also be able to purchase lifters and push rods from either of them when you purchase the cam. Don't be afraid to call their tech line. Both have excellent phone support.

You probably aren't going to find much by way of aftermarket, stronger than stock crank shafts. Your best bet would be to give a ring to your local Advanced Auto, Autozone, etc and check prices.