Crank end play, destroyed converter, 408 nightmare

[QUOTE="nm9stheham, post: 1972489334, member: 331881”]
....
Additionally, most of Austria is at or above 1000' altitude, and much higher in much of the country. That is going to lower the operating compression ratio. From direct experience, going from sea level (where I think autoxcuda lives) to 1000' altitude WILL make a very definite improvement in detonation resistance.....[/QUOTE]

Actually I’m in a suburb valley of Los Angeles at 768’ elevation. To get out of the valley one direction I go over a mountain pass at 1500’. That’s where I got light pinging in hot weather. Just did slight timing chance and other small things to fix.

But that’s with 9.7:1 compression, 416 stroker, edelbrock heads, quench, and a comp 274-S cam very close to original poster’s cam.