only if they are where they can be weathered, in a garaged condition they are fine for like 10 years or so.

Derek Johnson 88 TurboTBird 32psi, t3/t4 bb 50trim, megasquirt, 3 bar map, 50lb inj, roller cam w adj. gear, header, 3" downpipe and full exhaust, gutted intake manifolds, spec stg 3 95SE 3L gone