Quote:
Originally Posted by marcocsx3121
On a couple of occasions I ran the CO (original block) in CSX 3121 to 7000 rpm without a problem. BTW, the solid lifter 454 Chevy engine was an LS6; the LS7 is the 427 in the C6 Z06.
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Chevy did have an LS 7 454, it was slated for production in '71, but all the fed regulations caused it to be cancelled. As I recall it was going to be 475 hp and a about 525 ft lbs of tq. Some were made and ended up in boats. I've only seen one of them and it was in a boat.