removing 1500 manifolds

[Claudia Lied <cglied@whro.net>]

Advice needed!  I am in the process of replacing my 80 Spit's manifolds
after the exhaust split returning from a show the first day of BCW.  I have
all the upper nuts off, but cannot access the lower nuts with the tools I
have.  A DPO replaced these nuts with long, about 1 inch, nuts like those
used to connect threaded rod.  Does anyone know of a specific type of
wrench that will get over the exhaust and under the intake manifold to
reach these nuts?  
TIA  Gary Lied