NONE of the cast covers are going to clear EVERY aluminum rocker without using thick gaskets and/or trimming the rockers to clear the cast in reliefs for the retaining bolts. You are going to have to commit to a pair and make them fit.
For example Harlan Sharps are quite wide on the pusrod end requiring grinding/rounding the ends near the interference areas. some alloy rockers are smaller and may only require thick V-cover gaskets to clear.
Les
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Les Iden
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'65 Buick Sport Wagon Custom, 340, T350, 3:23
'66 GTO Post/468, 700R4, 3.31 (Mike's as of 9-16)
'68 Grand Prix/455, dual AFBs, T400, 2:93 posi (sold)
'72 TA tribute/461, T400, 3.08, (Russ's as of 9-16)
'97 Mitsubishi Eclipse Spyder Turbo, Konis, 5 speed
'09 Torrent GXP, nav, Sun & Sound pkg., Bilsteins
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