Hmm.. they're not all cracked. I've got a nice pair of 1967 dated long branch RA manifolds and they aren't cracked. The exhaust valve even moves but the bi-metallic actuation spring is long gone.
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1969 TA RAIII M40 Auto Cameo White/ Std Blue Int
1970 TA RAIII M21 4-spd Lucy Blue/Std Black Int
1971 TA 455 HO M22 4-Spd Lucy Blue/Deluxe White Int
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