Built a 73 block to SD specifications Nunzi did all the machine work. He asked me what rpm the max was for the engine. I said max 6K to 6.2 K. He asked about the oil pump, since it was a block I got from the junk yard I told him it was new. I gave him a NOS SD pump, he switched the spring to 60 psi and did work to the pump gears. He said no reason to run a 80 psi pump.
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