340 valve springs

Cams
Well, there are a million cam choices out there. The two I would suggest are the following Mopar Performance cams:

P4452759 .430"/.450" lift, 260/268 duration

P4452761 .450"/.455" lift, 268/272 duration

Both of these cams have a lobe seperation angle(LSA) of 110 and a 108 intake centerline(ICL). The "759" cam was developed to make more torque than the original 340 grind with the same horse power. The "761" cam was developed to make the same torque as the 340 grind but more h.p. Make sure you degree the cam in, very important. The 108 ICL is the installed point the factory suggests. My cam choice would be the "761". It will have a lope idle. Be sure to use a dual chain/gear set and match the valve springs to the cam choice. Either of the above cams can use 340 replacement valve springs or Mopar Performance P4120249.


This is all from that previous link.

Yes those ebay elgins should work for you on the cheap.