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Old 05-19-2021, 12:57 PM
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1157 motor head 1157 motor head is offline
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Join Date: Aug 2003
Location: wild rose
Posts: 176
Default Go Big 455 or not?

I have the original 389 out of my 65 GTO, It is a it has never been taken apart or bored over. I also have a 1971,455 complete engine that has never been bored over or any type of machine work done to it.
I want to build a strong street motor. Aluminum E heads, roller cam and rockers and so on.... The question is, do i buy a stroker kit for the 389 to make a 455? Or do i use the 455 to build the strong high horse power that i want? Is the 71 , 455 block a better / stronger casting than the 65 , 389 block?