Measure them........................
Welcome to the Forums.
No one is likely to have this info handy; I would simply lay the exhaust manifolds flat on the bench and measure the bolt lengths, while noting their positions. The bolts are 3/8" diameter w/ 9/16" heads, unless you use the smaller head header-type bolts.
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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