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193 Posts
What is the end goal?
Inexpensive rebuild... use what you got or can get cheaply... either casting leaves alot to be desired. If the pistons are reused, the D3's are probably less expensive.
Have some extra free time... porting either OE casting will significantly improve performance.
Want less weight... go aluminum (they usually flow better too).
But if you want a monster... pull out the credit card and stroke it add some P51's and an 871 on top. That would be some serious bolt on performance. 😁
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