70w-31 intake
#3
Unless you have a 1970 W 30 with a 350 and mismatched intake, I would say not more than an aftermarket intake. Why buy an orignial W 30 intake for bundles unless you are completely restoring one? It is a cool find though.
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#4
Correct, intact, date coded W-31 intakes are worth north of $1,000 to a restorer. As far as performance is concerned, the runner shape and flow is identical to that of the 1970 cast iron intake.
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