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Eddie H. · 05-19-2003, 07:13 PM

You can identify a sb 400 by the harmonic balancer with a counterweight on it. They were externally balanced, all other small blocks were internally balanced. All of them I've seen also have 3 freeze plugs on each side. If I remember correctly, they only came in 2 barrel versions.

05-19-2003, 07:13 PM	#2
Eddie H. Registered User Join Date: Mar 2001 Location: Paradise TX USA Posts: 1,200	You can identify a sb 400 by the harmonic balancer with a counterweight on it. They were externally balanced, all other small blocks were internally balanced. All of them I've seen also have 3 freeze plugs on each side. If I remember correctly, they only came in 2 barrel versions. __________________ "Negative people always seem to have a problem for every solution"