New lifters will be a MUST when installing the new cam, as flat-tappet lifters become cupped over time, and installing used lifters on a new cam will cause a mis-matched wear pattern and accelerated wear.
Also imperitive is the use of either a high-zinc-content oil (such as Shell Rotella 30wt) for the cam break-in to prevent cam and lifter damage (most gasoline-engine-formula oils lack sufficient zinc content due to tightening emissions standards, diesel-engine-formula oils still contain these additives, but the level will be decreasing there in the near future).
As far as the valvesprings go, new ones would not be a bad idea due to age, but you would need to call your cam manufacturer's tech line to see if the stock springs would hold up to the lift or not.
__________________ 1976 Ford Mustang II Ghia: 302 with a 600cfm Edelbrock carb, Edelbrock Performer 289 intake, Dynomax Blackjack headers, 2.5" exhaust with Flowmaster Super 44s. RJS 11-gallon fuel cell, C4 tranny, chrome 16" pony wheels, fuzzy dice, brown vinyl half-top, and painted in the tackiest color ever (harvest gold, that's why I call it "The Goldenrod").
Also have a 2003 Dodge Ram (lightly modded daily driver/tow rig/office/dining room/home away from home/workshop... I call it "The Big Blue Dawg".) | 
1974 mustang ii 2.8 cam 
