I was reading conflicting info on the www. Some referenced the 427 heads as having the larger valves, while the 396 got the smaller ones. My heads are on the block and I haven't actually checked them, but I will guess they are the smaller valves.
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Mitch
1970 Chevelle SS
1966 Chevelle SS
1967 Camaro ss/rs
1938 Business coupe, street rod
2000 FXSTS, original owner, 13k miles
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