Thread: Cadillac 500 head questions

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Cadillac heads don't need hardened seats as they are high nickel steel.
No need to use the earlier pistons as these days there are KB hypereutetic or Forged available.
You can't use the earlier piston with the later 120cc heads as the compression ratio would be stupid. Also the stock pistons either early or late are not recommended.

My engine will produce in the region of 600bhp @ 5500rpm built as per Docs book, my pistons are +60 thou so is 514ci the only original part is the block and crank and both of those have been heavily modified.

Originally Posted by vara4

I would still install new valves and have the heads re - worked for todays fuel because those were made for leaded fuels. I am not sure how deep you are getting in to the moter but I would if I were re - building it use the earlier 70 pistons for the 500 because they are also differant then the later 500 pistons.
Kurt