Re: 69 427 Corvette Tri Power Question
1967-68 427/400 and 427/435 engines using List #3659 all appeared to use spring #38R-477, color-coded brown, on all applications regardless of transmission. I would think the same would apply to 1969 as well.
Spring kit #20-13/85BP-3185 may still be available and offers a selection of springs with varying opening rates that can be used on the 2300s.
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