I agree with the list here, a 400 is no replacement
for a 413. If you had to do anything, go for the 440,
you can get them rebuilt fairly cheaply compared to
the 413. plus, both a 440 and 413 are RB big blocks,
the 400 and 383 are low deck designs, so the 440 would
at least "look right" in place of the 413.
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--Mike Pittinaro
One point eight litres
Stromberg carburators sing
Loose nut at the wheel
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