Also the 66 Sprint Exhaust manifold only bolts up to the 66 Intake manifold due to the difference in the exhaust heat passage shape.
Also unique camshaft, remember the 66 4bbls OHC-6 was rated at 207 HP, and most 67-69 versions were rated at 215 HP. Partly due to the 66 using the "B" Camshaft, and the 67-69's using the "E" camshaft.
Those are the only other differences I am aware of that haven't been covered y previous Posts.
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Jeff R
60 Jaguar Mark 2, 3.8L Automatic
67 Sprint Firebird 230 OHC-6 4-Speed A/C
78 Catlina Safari, Pontiac 400 powered
77 Astre Formula, 215 Buick V-8 T-5
73 Lemans Safari, 400 4bbl 4-speed
71 Catalina Enforcer, 455 4bbl
06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed!
2012 F-150 Echo Boost (My local Ford Dealer SUX!!!)
2020 Dodge Charger Scat pack (recovered)
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