LT1 head casting numbers?
#1
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Hey I have a question about LT1 heads.
Is there any of the aluminum heads that are a better casting or anything like that? or are they all the similar?
Thanks
Aaron
Is there any of the aluminum heads that are a better casting or anything like that? or are they all the similar?
Thanks
Aaron
#2
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iTrader: (4)
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Lots of info on this out there- the 10128374 and 10207643 are the ones AI will port for you. the 561 castings are ok for porting, but flow best as-cast vs the older 2 castings from 93-95. If you want the best as they popped out from the factory, try the 561s. If you want porting from mild to max effort, go with the older 2 castings or go aftermarket if you prefer.
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Suddenly it wasn't so cheap anymore
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