340 valve springs

mopar340dave said
http://cgi.ebay.com/ebaymotors/NEW-...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

Check these out while I look at some others.
They are Elgins and the price is right.
16 NEW ELGIN PRO STOCK # RV-9908S HIGH PERFORMANCE VALVE SPRINGS.....
FOR 273-318-340-360ci V8 SMALL BLOCK MOPAR-CHRYSLER PRODUCT....
SINGLE WITH DAMPER....
WILL HANDLE CAMS WITH 505 LIFT.....
1.494 DIAMETER....95 # @ 1.650....270 # @ 1.200..COIL BIND 1.085.......

These are $30, while the Mopar Performance springs are (16x9) $144. I like saving some dough, but are the $30 springs up to the task?

Also regarding the 340 article from comp cams, I am a little confused as to which springs and keepers they used. I'll call them to clarify.