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The #215 396 head is not the same it has small 98 to 101cc closed chambers and full size oval ports.
it was used on the hi perf 396-350HP chevelle motors.. also used on the 360hp and 390HP 427
its a good high perf closed chamber oval port head. (gets real good with porting)
The 148 head is a low compression low rpm 2 barrel carb truck head.
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