I talked to Tom Langdon about using his cast iron headers for a turbo application,he said nobody he knows has done it & said they should be good for that.
I would rather use his new header castings over a used truck manifold that would be a bit restrictive plus you need to block off the top of the manifold where it boltsa up to the intake manifold for heat.
http://www.stoveboltengineco.com/acartpro/Just a thought.
MBHD
