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So what combo works best on 87 octane? By Charles - 07/04/2001 2:52:53 PM; IP 207.172.73.154 So if the deck is 10.170, stroke is 3.786", rod is 6.488" (stock 390 values), that's zero-deck at 1.789" comp ht. If I use the 360 rod (6.540) then zero-deck is 1.737". PIstons I can find are 1.660, 1.740, 1.760, 1.776. Seems like the Sterling low-comp truck piston (1.660) would be a long ways down the bore (0.129 or 0.077) and although this would lower the CR, it wouldn't help detonation resistance without the squish. KB-Silvolite has a 391 piston with a ~30cc dish for a nice low CR and a 1.740 comp ht. This'd be +0.003 (above deck) without machining. Seems like a .040 thick head gasket would still give enough head-to-piston clearance in a low rpm truck engine. Thoughts?

This thread, so far...

Skip Navigation Links.  What is the deck height on 360/390? -- Charles, 07/03/2001  10.17" but it's always best to measure -- Walker, 07/03/2001  RE: 10.17" but it's always best to measure -- Dave Shoe, 07/03/2001 So what combo works best on 87 octane? -- Charles, 07/04/2001

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